diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f172dff..c0973d9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,14 +13,14 @@ jobs:
 
     steps:
 
-    - uses: actions/checkout@v2.3.1
+    - uses: actions/checkout@v2.3.3
       with:
         fetch-depth: 2
         
     - run: git checkout HEAD^
 
     - name: Set up JDK 1.8
-      uses: actions/setup-java@v1
+      uses: actions/setup-java@v1.4.2
       with:
         java-version: 1.8
 
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index afc6b87..3137f79 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -12,7 +12,7 @@ jobs:
 
     steps:
 
-    - uses: actions/checkout@v2.3.1
+    - uses: actions/checkout@v2.3.3
       with:
         fetch-depth: 2
 
@@ -21,7 +21,7 @@ jobs:
         git checkout master
 
     - name: Set up JDK 1.8
-      uses: actions/setup-java@v1
+      uses: actions/setup-java@v1.4.2
       with:
         java-version: 1.8
 
@@ -46,7 +46,7 @@ jobs:
           -d '{ "tag_name": "'$version'", "target_commitish": "master", "name": "'$version'", "body": "Release deployment", "draft": false, "prerelease": false }'
 
     - name: Create Maven settings.xml
-      uses: whelk-io/maven-settings-xml-action@v9
+      uses: whelk-io/maven-settings-xml-action@v12
       with:
         servers: '[{"id": "github", "username": "${{ secrets.BUILD_USERNAME }}", "password": "${{ secrets.BUILD_TOKEN }}"}]'
 
@@ -54,7 +54,7 @@ jobs:
       run: mvn -B deploy --file pom.xml
 
     - name: Checkout develop branch
-      uses: actions/checkout@v2.3.1
+      uses: actions/checkout@v2.3.3
       with:
         branch: develop
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 405328a..c48c58a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
 
-    - uses: actions/checkout@v2.3.1
+    - uses: actions/checkout@v2.3.3
       with:
         fetch-depth: 2
 
@@ -20,7 +20,7 @@ jobs:
         git checkout develop
 
     - name: Set up JDK 1.8
-      uses: actions/setup-java@v1
+      uses: actions/setup-java@v1.4.2
       with:
         java-version: 1.8
 
diff --git a/pom.xml b/pom.xml
index 346e6a5..f252c4e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
 
 	<groupId>io.whelk.hy.phen</groupId>
 	<artifactId>whelk-hy-phen-a-tion</artifactId>
-	<version>0.0.20-RELEASE</version>
+	<version>0.0.21-RELEASE</version>
 	<name>Hy-phen-a-tion</name>
 	<description>Java OSS library for calculating syllables and hyphenation using Frank Liang's doctoral thesis.</description>
 	<url>https://github.com/whelk-io/hy-phen-a-tion</url>
@@ -51,7 +51,7 @@
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
-			<version>4.13</version>
+			<version>4.13.1</version>
 			<scope>test</scope>
 		</dependency>