diff --git a/Dockerfile b/Dockerfile
index 4857acb..5ecfd08 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,13 +9,13 @@ RUN apt-get update && apt-get install -y ghc cabal-install
 # Install Haskell deps
 # (This is a separate copy/run so that source changes don't require rebuilding)
 COPY ShellCheck.cabal ./
-RUN cabal update && cabal install --dependencies-only
+RUN cabal update && cabal install --dependencies-only --ghc-options="-optlo-Os -split-sections"
 
 # Copy source and build it
 COPY LICENSE Setup.hs shellcheck.hs ./
 COPY src src
 RUN cabal build Paths_ShellCheck && \
-  ghc -optl-static -optl-pthread -isrc -idist/build/autogen --make shellcheck && \
+  ghc -optl-static -optl-pthread -isrc -idist/build/autogen --make shellcheck -split-sections -optc-Wl,--gc-sections -optlo-Os && \
   strip --strip-all shellcheck
 
 RUN mkdir -p /out/bin && \