diff --git a/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppCreateRequest.java b/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppCreateRequest.java
index d898d23..4f7b4c0 100644
--- a/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppCreateRequest.java
+++ b/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppCreateRequest.java
@@ -1,5 +1,6 @@
 package com.databasir.core.domain.app.data;
 
+import com.databasir.dao.enums.OAuthAppType;
 import lombok.Data;
 
 import javax.validation.constraints.NotBlank;
@@ -14,8 +15,8 @@ public class OAuthAppCreateRequest {
     @NotBlank
     private String appName;
 
-    @NotBlank
-    private String appType;
+    @NotNull
+    private OAuthAppType appType;
 
     private String appIcon;
 
diff --git a/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppDetailResponse.java b/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppDetailResponse.java
index fc2428a..60d435f 100644
--- a/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppDetailResponse.java
+++ b/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppDetailResponse.java
@@ -1,5 +1,6 @@
 package com.databasir.core.domain.app.data;
 
+import com.databasir.dao.enums.OAuthAppType;
 import lombok.Data;
 
 import java.time.LocalDateTime;
@@ -13,7 +14,7 @@ public class OAuthAppDetailResponse {
 
     private String appIcon;
 
-    private String appType;
+    private OAuthAppType appType;
 
     private String registrationId;
 
diff --git a/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppPageCondition.java b/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppPageCondition.java
index 94666f0..e3d5595 100644
--- a/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppPageCondition.java
+++ b/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppPageCondition.java
@@ -1,6 +1,7 @@
 package com.databasir.core.domain.app.data;
 
 import com.databasir.dao.Tables;
+import com.databasir.dao.enums.OAuthAppType;
 import lombok.Data;
 import org.jooq.Condition;
 import org.jooq.impl.DSL;
@@ -13,7 +14,7 @@ public class OAuthAppPageCondition {
 
     private String appNameContains;
 
-    private String appType;
+    private OAuthAppType appType;
 
     public Condition toCondition() {
         List<Condition> conditions = new ArrayList<>();
diff --git a/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppPageResponse.java b/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppPageResponse.java
index 46e27c8..ae1ce0c 100644
--- a/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppPageResponse.java
+++ b/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppPageResponse.java
@@ -1,5 +1,6 @@
 package com.databasir.core.domain.app.data;
 
+import com.databasir.dao.enums.OAuthAppType;
 import lombok.Data;
 
 import java.time.LocalDateTime;
@@ -13,7 +14,7 @@ public class OAuthAppPageResponse {
 
     private String appIcon;
 
-    private String appType;
+    private OAuthAppType appType;
 
     private String registrationId;
 
diff --git a/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppResponse.java b/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppResponse.java
index c460aae..c45ed75 100644
--- a/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppResponse.java
+++ b/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppResponse.java
@@ -1,5 +1,6 @@
 package com.databasir.core.domain.app.data;
 
+import com.databasir.dao.enums.OAuthAppType;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Data;
@@ -19,7 +20,7 @@ public class OAuthAppResponse {
 
     private String appIcon;
 
-    private String appType;
+    private OAuthAppType appType;
 
     private String registrationId;
 
diff --git a/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppUpdateRequest.java b/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppUpdateRequest.java
index 0d633cd..b8d2501 100644
--- a/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppUpdateRequest.java
+++ b/core/src/main/java/com/databasir/core/domain/app/data/OAuthAppUpdateRequest.java
@@ -1,5 +1,6 @@
 package com.databasir.core.domain.app.data;
 
+import com.databasir.dao.enums.OAuthAppType;
 import lombok.Data;
 
 import javax.validation.constraints.NotBlank;
@@ -17,8 +18,8 @@ public class OAuthAppUpdateRequest {
     @NotBlank
     private String appName;
 
-    @NotBlank
-    private String appType;
+    @NotNull
+    private OAuthAppType appType;
 
     private String appIcon;
 
diff --git a/core/src/main/java/com/databasir/core/domain/app/handler/GithubOpenAuthHandler.java b/core/src/main/java/com/databasir/core/domain/app/handler/GithubOpenAuthHandler.java
index 24ac022..8141bfd 100644
--- a/core/src/main/java/com/databasir/core/domain/app/handler/GithubOpenAuthHandler.java
+++ b/core/src/main/java/com/databasir/core/domain/app/handler/GithubOpenAuthHandler.java
@@ -21,8 +21,8 @@ public class GithubOpenAuthHandler implements OpenAuthHandler {
     private final GithubRemoteService githubRemoteService;
 
     @Override
-    public boolean support(String oauthAppType) {
-        return OAuthAppType.GITHUB.isSame(oauthAppType);
+    public boolean support(OAuthAppType oauthAppType) {
+        return OAuthAppType.GITHUB == oauthAppType;
     }
 
     @Override
diff --git a/core/src/main/java/com/databasir/core/domain/app/handler/GitlabOpenAuthHandler.java b/core/src/main/java/com/databasir/core/domain/app/handler/GitlabOpenAuthHandler.java
index fb8327e..d80a2e7 100644
--- a/core/src/main/java/com/databasir/core/domain/app/handler/GitlabOpenAuthHandler.java
+++ b/core/src/main/java/com/databasir/core/domain/app/handler/GitlabOpenAuthHandler.java
@@ -19,8 +19,8 @@ public class GitlabOpenAuthHandler implements OpenAuthHandler {
     private final GitlabRemoteService gitlabRemoteService;
 
     @Override
-    public boolean support(String oauthAppType) {
-        return OAuthAppType.GITLAB.isSame(oauthAppType);
+    public boolean support(OAuthAppType oauthAppType) {
+        return OAuthAppType.GITLAB == oauthAppType;
     }
 
     @Override
diff --git a/core/src/main/java/com/databasir/core/domain/app/handler/OpenAuthHandler.java b/core/src/main/java/com/databasir/core/domain/app/handler/OpenAuthHandler.java
index 96f8a62..0878538 100644
--- a/core/src/main/java/com/databasir/core/domain/app/handler/OpenAuthHandler.java
+++ b/core/src/main/java/com/databasir/core/domain/app/handler/OpenAuthHandler.java
@@ -1,12 +1,13 @@
 package com.databasir.core.domain.app.handler;
 
+import com.databasir.dao.enums.OAuthAppType;
 import com.databasir.dao.tables.pojos.OauthAppPojo;
 
 import java.util.Map;
 
 public interface OpenAuthHandler {
 
-    boolean support(String oauthAppType);
+    boolean support(OAuthAppType oauthAppType);
 
     String authorizationUrl(OauthAppPojo app, Map<String, String[]> requestParams);
 
diff --git a/dao/build.gradle b/dao/build.gradle
index 51b9a6b..f9babf2 100644
--- a/dao/build.gradle
+++ b/dao/build.gradle
@@ -60,6 +60,12 @@ jooq {
                                 includeExpression = '.*'
                                 includeTypes = 'INET'
                             }
+                            forcedType {
+                                userType = 'com.databasir.dao.enums.OAuthAppType'
+                                converter  = 'com.databasir.dao.converter.OAuthAppTypeConverter'
+                                includeExpression = 'app_type'
+                                includeTypes = '.*'
+                            }
                         }
                     }
                     generate {
diff --git a/dao/generated-src/jooq/main/java/com/databasir/dao/tables/OauthApp.java b/dao/generated-src/jooq/main/java/com/databasir/dao/tables/OauthApp.java
index ea3cee8..6d27c3a 100644
--- a/dao/generated-src/jooq/main/java/com/databasir/dao/tables/OauthApp.java
+++ b/dao/generated-src/jooq/main/java/com/databasir/dao/tables/OauthApp.java
@@ -6,6 +6,8 @@ package com.databasir.dao.tables;
 
 import com.databasir.dao.Databasir;
 import com.databasir.dao.Keys;
+import com.databasir.dao.converter.OAuthAppTypeConverter;
+import com.databasir.dao.enums.OAuthAppType;
 import com.databasir.dao.tables.records.OauthAppRecord;
 
 import java.time.LocalDateTime;
@@ -72,7 +74,7 @@ public class OauthApp extends TableImpl<OauthAppRecord> {
     /**
      * The column <code>databasir.oauth_app.app_type</code>. github, gitlab
      */
-    public final TableField<OauthAppRecord, String> APP_TYPE = createField(DSL.name("app_type"), SQLDataType.VARCHAR(64).nullable(false), this, "github, gitlab");
+    public final TableField<OauthAppRecord, OAuthAppType> APP_TYPE = createField(DSL.name("app_type"), SQLDataType.VARCHAR(64).nullable(false), this, "github, gitlab", new OAuthAppTypeConverter());
 
     /**
      * The column <code>databasir.oauth_app.client_id</code>.
@@ -193,7 +195,7 @@ public class OauthApp extends TableImpl<OauthAppRecord> {
     // -------------------------------------------------------------------------
 
     @Override
-    public Row12<Integer, String, String, String, String, String, String, String, String, String, LocalDateTime, LocalDateTime> fieldsRow() {
+    public Row12<Integer, String, String, String, OAuthAppType, String, String, String, String, String, LocalDateTime, LocalDateTime> fieldsRow() {
         return (Row12) super.fieldsRow();
     }
 }
diff --git a/dao/generated-src/jooq/main/java/com/databasir/dao/tables/pojos/OauthAppPojo.java b/dao/generated-src/jooq/main/java/com/databasir/dao/tables/pojos/OauthAppPojo.java
index 1670761..f1dbb1d 100644
--- a/dao/generated-src/jooq/main/java/com/databasir/dao/tables/pojos/OauthAppPojo.java
+++ b/dao/generated-src/jooq/main/java/com/databasir/dao/tables/pojos/OauthAppPojo.java
@@ -4,6 +4,8 @@
 package com.databasir.dao.tables.pojos;
 
 
+import com.databasir.dao.enums.OAuthAppType;
+
 import java.io.Serializable;
 import java.time.LocalDateTime;
 
@@ -20,7 +22,7 @@ public class OauthAppPojo implements Serializable {
     private String        registrationId;
     private String        appName;
     private String        appIcon;
-    private String        appType;
+    private OAuthAppType  appType;
     private String        clientId;
     private String        clientSecret;
     private String        authUrl;
@@ -51,7 +53,7 @@ public class OauthAppPojo implements Serializable {
         String        registrationId,
         String        appName,
         String        appIcon,
-        String        appType,
+        OAuthAppType  appType,
         String        clientId,
         String        clientSecret,
         String        authUrl,
@@ -133,14 +135,14 @@ public class OauthAppPojo implements Serializable {
     /**
      * Getter for <code>databasir.oauth_app.app_type</code>. github, gitlab
      */
-    public String getAppType() {
+    public OAuthAppType getAppType() {
         return this.appType;
     }
 
     /**
      * Setter for <code>databasir.oauth_app.app_type</code>. github, gitlab
      */
-    public void setAppType(String appType) {
+    public void setAppType(OAuthAppType appType) {
         this.appType = appType;
     }
 
diff --git a/dao/generated-src/jooq/main/java/com/databasir/dao/tables/records/OauthAppRecord.java b/dao/generated-src/jooq/main/java/com/databasir/dao/tables/records/OauthAppRecord.java
index 20d9d5e..54d3315 100644
--- a/dao/generated-src/jooq/main/java/com/databasir/dao/tables/records/OauthAppRecord.java
+++ b/dao/generated-src/jooq/main/java/com/databasir/dao/tables/records/OauthAppRecord.java
@@ -4,6 +4,7 @@
 package com.databasir.dao.tables.records;
 
 
+import com.databasir.dao.enums.OAuthAppType;
 import com.databasir.dao.tables.OauthApp;
 import com.databasir.dao.tables.pojos.OauthAppPojo;
 
@@ -20,7 +21,7 @@ import org.jooq.impl.UpdatableRecordImpl;
  * oauth app info
  */
 @SuppressWarnings({ "all", "unchecked", "rawtypes" })
-public class OauthAppRecord extends UpdatableRecordImpl<OauthAppRecord> implements Record12<Integer, String, String, String, String, String, String, String, String, String, LocalDateTime, LocalDateTime> {
+public class OauthAppRecord extends UpdatableRecordImpl<OauthAppRecord> implements Record12<Integer, String, String, String, OAuthAppType, String, String, String, String, String, LocalDateTime, LocalDateTime> {
 
     private static final long serialVersionUID = 1L;
 
@@ -83,15 +84,15 @@ public class OauthAppRecord extends UpdatableRecordImpl<OauthAppRecord> implemen
     /**
      * Setter for <code>databasir.oauth_app.app_type</code>. github, gitlab
      */
-    public void setAppType(String value) {
+    public void setAppType(OAuthAppType value) {
         set(4, value);
     }
 
     /**
      * Getter for <code>databasir.oauth_app.app_type</code>. github, gitlab
      */
-    public String getAppType() {
-        return (String) get(4);
+    public OAuthAppType getAppType() {
+        return (OAuthAppType) get(4);
     }
 
     /**
@@ -206,12 +207,12 @@ public class OauthAppRecord extends UpdatableRecordImpl<OauthAppRecord> implemen
     // -------------------------------------------------------------------------
 
     @Override
-    public Row12<Integer, String, String, String, String, String, String, String, String, String, LocalDateTime, LocalDateTime> fieldsRow() {
+    public Row12<Integer, String, String, String, OAuthAppType, String, String, String, String, String, LocalDateTime, LocalDateTime> fieldsRow() {
         return (Row12) super.fieldsRow();
     }
 
     @Override
-    public Row12<Integer, String, String, String, String, String, String, String, String, String, LocalDateTime, LocalDateTime> valuesRow() {
+    public Row12<Integer, String, String, String, OAuthAppType, String, String, String, String, String, LocalDateTime, LocalDateTime> valuesRow() {
         return (Row12) super.valuesRow();
     }
 
@@ -236,7 +237,7 @@ public class OauthAppRecord extends UpdatableRecordImpl<OauthAppRecord> implemen
     }
 
     @Override
-    public Field<String> field5() {
+    public Field<OAuthAppType> field5() {
         return OauthApp.OAUTH_APP.APP_TYPE;
     }
 
@@ -296,7 +297,7 @@ public class OauthAppRecord extends UpdatableRecordImpl<OauthAppRecord> implemen
     }
 
     @Override
-    public String component5() {
+    public OAuthAppType component5() {
         return getAppType();
     }
 
@@ -356,7 +357,7 @@ public class OauthAppRecord extends UpdatableRecordImpl<OauthAppRecord> implemen
     }
 
     @Override
-    public String value5() {
+    public OAuthAppType value5() {
         return getAppType();
     }
 
@@ -420,7 +421,7 @@ public class OauthAppRecord extends UpdatableRecordImpl<OauthAppRecord> implemen
     }
 
     @Override
-    public OauthAppRecord value5(String value) {
+    public OauthAppRecord value5(OAuthAppType value) {
         setAppType(value);
         return this;
     }
@@ -468,7 +469,7 @@ public class OauthAppRecord extends UpdatableRecordImpl<OauthAppRecord> implemen
     }
 
     @Override
-    public OauthAppRecord values(Integer value1, String value2, String value3, String value4, String value5, String value6, String value7, String value8, String value9, String value10, LocalDateTime value11, LocalDateTime value12) {
+    public OauthAppRecord values(Integer value1, String value2, String value3, String value4, OAuthAppType value5, String value6, String value7, String value8, String value9, String value10, LocalDateTime value11, LocalDateTime value12) {
         value1(value1);
         value2(value2);
         value3(value3);
@@ -498,7 +499,7 @@ public class OauthAppRecord extends UpdatableRecordImpl<OauthAppRecord> implemen
     /**
      * Create a detached, initialised OauthAppRecord
      */
-    public OauthAppRecord(Integer id, String registrationId, String appName, String appIcon, String appType, String clientId, String clientSecret, String authUrl, String resourceUrl, String scope, LocalDateTime updateAt, LocalDateTime createAt) {
+    public OauthAppRecord(Integer id, String registrationId, String appName, String appIcon, OAuthAppType appType, String clientId, String clientSecret, String authUrl, String resourceUrl, String scope, LocalDateTime updateAt, LocalDateTime createAt) {
         super(OauthApp.OAUTH_APP);
 
         setId(id);
diff --git a/dao/src/main/java/com/databasir/dao/converter/OAuthAppTypeConverter.java b/dao/src/main/java/com/databasir/dao/converter/OAuthAppTypeConverter.java
new file mode 100644
index 0000000..1a56743
--- /dev/null
+++ b/dao/src/main/java/com/databasir/dao/converter/OAuthAppTypeConverter.java
@@ -0,0 +1,12 @@
+package com.databasir.dao.converter;
+
+import com.databasir.dao.enums.OAuthAppType;
+import org.jooq.impl.EnumConverter;
+
+public class OAuthAppTypeConverter extends EnumConverter<String, OAuthAppType> {
+
+    public OAuthAppTypeConverter() {
+        super(String.class, OAuthAppType.class);
+    }
+
+}