diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 0a6538f..89ebda5 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -30,7 +30,7 @@ jobs:
         chmod +x "${GITHUB_WORKSPACE}/BuildTools/build-pre1.17.sh"
         # run script
         "${GITHUB_WORKSPACE}/BuildTools/build-pre1.17.sh"
-      shell: bash
+      shell: sh
       
     - name: Set up JDK 16
       uses: actions/setup-java@v2
@@ -45,7 +45,7 @@ jobs:
         chmod +x "${GITHUB_WORKSPACE}/BuildTools/build-1.17.sh"
         # run script
         "${GITHUB_WORKSPACE}/BuildTools/build-1.17.sh"
-      shell: bash
+      shell: sh
     
     - name: Set up JDK 17
       uses: actions/setup-java@v2
@@ -60,7 +60,7 @@ jobs:
         chmod +x "${GITHUB_WORKSPACE}/BuildTools/build-1.18+.sh"
         # run script
         "${GITHUB_WORKSPACE}/BuildTools/build-pre1.18+.sh"
-      shell: bash
+      shell: sh
       
     - name: Build with Maven
       run: mvn -B package --file pom.xml