diff --git a/.flutter b/.flutter
index d63987f..67457e6 160000
--- a/.flutter
+++ b/.flutter
@@ -1 +1 @@
-Subproject commit d63987f71d63dca9126f25f4ae810dbf3e511ad6
+Subproject commit 67457e669f79e9f8d13d7a68fe09775fefbb79f4
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d3b5a05..02ae810 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,16 +23,27 @@ jobs:
           gpg_private_key: ${{ secrets.PGP_KEY_BASE64 }}
           passphrase: ${{ secrets.PGP_PASSPHRASE }}
 
+      - name: Check submodule
+        id: check_submodule
+        run: |
+          SUBMODULE_COMMIT="$(cd .flutter; git rev-parse --short HEAD; cd ..)"
+          FLUTTER_COMMIT="$(flutter --version | head -2 | tail -1 | awk '{print $4}')"
+          echo "SUBMODULE_COMMIT=$SUBMODULE_COMMIT, FLUTTER_COMMIT=$FLUTTER_COMMIT"
+          if [ "$SUBMODULE_COMMIT" != "$FLUTTER_COMMIT" ]; then
+            echo "Your submodule has not been updated!"
+            exit 1
+          fi
+
       - name: Extract Version
         id: extract_version      
         run: |
-           VERSION=$(grep -oP "^version: [^\+]+" pubspec.yaml | tail -c +10)
-           echo "version=$VERSION" >> $GITHUB_OUTPUT
-           if [ ${{ inputs.beta }} == true ]; then BETA=true; else BETA=false; fi
-           echo "beta=$BETA" >> $GITHUB_OUTPUT
-           TAG="v$VERSION"
-           if [ $BETA == true ]; then TAG="$TAG"-beta; fi
-           echo "tag=$TAG" >> $GITHUB_OUTPUT
+          VERSION=$(grep -oP "^version: [^\+]+" pubspec.yaml | tail -c +10)
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+          if [ ${{ inputs.beta }} == true ]; then BETA=true; else BETA=false; fi
+          echo "beta=$BETA" >> $GITHUB_OUTPUT
+          TAG="v$VERSION"
+          if [ $BETA == true ]; then TAG="$TAG"-beta; fi
+          echo "tag=$TAG" >> $GITHUB_OUTPUT
 
       - name: Build APKs
         run: |
diff --git a/build.sh b/build.sh
index 26dc8b9..baadadb 100755
--- a/build.sh
+++ b/build.sh
@@ -7,6 +7,9 @@ trap "cd "$CURR_DIR"" EXIT
 if [ -z "$1" ]; then
     git fetch && git merge origin/main && git push # Typically run after a PR to main, so bring dev up to date
 fi
+cd .flutter
+git checkout "$(flutter --version | head -2 | tail -1 | awk '{print $4}')" # Ensure included Flutter submodule version equals my environment
+cd ..
 rm ./build/app/outputs/flutter-apk/* 2>/dev/null                                       # Get rid of older builds if any
 flutter build apk --flavor normal && flutter build apk --split-per-abi --flavor normal # Build (both split and combined APKs)
 for file in ./build/app/outputs/flutter-apk/app-*normal*.apk*; do mv "$file" "${file//-normal/}"; done