diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 2cdb476..91fb815 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -36,7 +36,9 @@ jobs:
         cache: gradle
 
     - name: Build with Gradle
-      run: gradle clean build -PjavacRelease=${{ matrix.java }}
+      run: | 
+        git submodule update --init
+        gradle clean build -PjavacRelease=${{ matrix.java }}
 
     - name: SHA256
       if: matrix.upload