diff --git a/.github/workflows/updateMarkdown.yml b/.github/workflows/updateMarkdown.yml
index 6fe2d6d40..dbbf71f57 100644
--- a/.github/workflows/updateMarkdown.yml
+++ b/.github/workflows/updateMarkdown.yml
@@ -23,9 +23,9 @@ jobs:
         uses: github-actions-x/commit@v2.9
         with:
           commit-message: ". d updated markdown snippets"
-          rebase: 'true'  
+          rebase: 'true'
           github-token: ${{ secrets.GITHUB_TOKEN }}
           push-branch: 'master'
           name: github actions
-          email: actions@github.com 
+          email: actions@github.com
     
diff --git a/approvaltests-tests/pom.xml b/approvaltests-tests/pom.xml
index 2c9e975da..7b5799ab9 100644
--- a/approvaltests-tests/pom.xml
+++ b/approvaltests-tests/pom.xml
@@ -146,8 +146,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>17</source>
-                    <target>17</target>
+                    <source>15</source>
+                    <target>15</target>
                 </configuration>
             </plugin>
         </plugins>
diff --git a/approvaltests-util-tests/pom.xml b/approvaltests-util-tests/pom.xml
index ac1778275..49b608ffb 100644
--- a/approvaltests-util-tests/pom.xml
+++ b/approvaltests-util-tests/pom.xml
@@ -77,8 +77,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>17</source>
-                    <target>17</target>
+                    <source>15</source>
+                    <target>15</target>
                 </configuration>
             </plugin>
             <plugin>