Merge branch 'master' of https://gitbox.apache.org/repos/asf/commons-cli.git
diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 45d54fa..50bd3a3 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -26,7 +26,7 @@
         java: [ 8, 11, 14 ]
         
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.3.1
     - name: Set up JDK ${{ matrix.java }}
       uses: actions/setup-java@v1
       with:
diff --git a/pom.xml b/pom.xml
index 8423159..fa6e672 100644
--- a/pom.xml
+++ b/pom.xml
@@ -19,7 +19,7 @@
   <parent>
     <groupId>org.apache.commons</groupId>
     <artifactId>commons-parent</artifactId>
-    <version>48</version>
+    <version>51</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
   <groupId>commons-cli</groupId>