diff --git a/documentation-support/pom.xml b/documentation-support/pom.xml
index c22adb68..4c29bb57 100644
--- a/documentation-support/pom.xml
+++ b/documentation-support/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>tech.picnic.error-prone-support</groupId>
         <artifactId>error-prone-support</artifactId>
-        <version>0.21.0</version>
+        <version>0.21.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>documentation-support</artifactId>
diff --git a/error-prone-contrib/pom.xml b/error-prone-contrib/pom.xml
index 5c789b3f..0927880f 100644
--- a/error-prone-contrib/pom.xml
+++ b/error-prone-contrib/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>tech.picnic.error-prone-support</groupId>
         <artifactId>error-prone-support</artifactId>
-        <version>0.21.0</version>
+        <version>0.21.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>error-prone-contrib</artifactId>
diff --git a/error-prone-experimental/pom.xml b/error-prone-experimental/pom.xml
index ec951d0a..947d319c 100644
--- a/error-prone-experimental/pom.xml
+++ b/error-prone-experimental/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>tech.picnic.error-prone-support</groupId>
         <artifactId>error-prone-support</artifactId>
-        <version>0.21.0</version>
+        <version>0.21.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>error-prone-experimental</artifactId>
diff --git a/error-prone-guidelines/pom.xml b/error-prone-guidelines/pom.xml
index 7c4f13ad..bf14d998 100644
--- a/error-prone-guidelines/pom.xml
+++ b/error-prone-guidelines/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>tech.picnic.error-prone-support</groupId>
         <artifactId>error-prone-support</artifactId>
-        <version>0.21.0</version>
+        <version>0.21.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>error-prone-guidelines</artifactId>
diff --git a/error-prone-utils/pom.xml b/error-prone-utils/pom.xml
index c3836c64..926a567a 100644
--- a/error-prone-utils/pom.xml
+++ b/error-prone-utils/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>tech.picnic.error-prone-support</groupId>
         <artifactId>error-prone-support</artifactId>
-        <version>0.21.0</version>
+        <version>0.21.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>error-prone-utils</artifactId>
diff --git a/pom.xml b/pom.xml
index 86774ed5..b144221c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>tech.picnic.error-prone-support</groupId>
     <artifactId>error-prone-support</artifactId>
-    <version>0.21.0</version>
+    <version>0.21.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <name>Picnic :: Error Prone Support</name>
@@ -52,7 +52,7 @@
 
     <scm child.scm.developerConnection.inherit.append.path="false" child.scm.url.inherit.append.path="false">
         <developerConnection>scm:git:git@github.com:PicnicSupermarket/error-prone-support.git</developerConnection>
-        <tag>v0.21.0</tag>
+        <tag>HEAD</tag>
         <url>https://github.com/PicnicSupermarket/error-prone-support</url>
     </scm>
     <issueManagement>
@@ -146,7 +146,7 @@
         <error-prone.self-check-args />
         <!-- The build timestamp is derived from the most recent commit
         timestamp in support of reproducible builds. -->
-        <project.build.outputTimestamp>2025-03-24T10:36:40Z</project.build.outputTimestamp>
+        <project.build.outputTimestamp>2025-03-24T10:41:07Z</project.build.outputTimestamp>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <!-- Glob pattern identifying Refaster rule definition files. These
         Java classes don't contain "regular" code, and thus require special
diff --git a/refaster-compiler/pom.xml b/refaster-compiler/pom.xml
index 353050c0..dbafa401 100644
--- a/refaster-compiler/pom.xml
+++ b/refaster-compiler/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>tech.picnic.error-prone-support</groupId>
         <artifactId>error-prone-support</artifactId>
-        <version>0.21.0</version>
+        <version>0.21.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>refaster-compiler</artifactId>
diff --git a/refaster-runner/pom.xml b/refaster-runner/pom.xml
index 07222c89..ce1af2dd 100644
--- a/refaster-runner/pom.xml
+++ b/refaster-runner/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>tech.picnic.error-prone-support</groupId>
         <artifactId>error-prone-support</artifactId>
-        <version>0.21.0</version>
+        <version>0.21.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>refaster-runner</artifactId>
diff --git a/refaster-support/pom.xml b/refaster-support/pom.xml
index d81db309..9b100284 100644
--- a/refaster-support/pom.xml
+++ b/refaster-support/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>tech.picnic.error-prone-support</groupId>
         <artifactId>error-prone-support</artifactId>
-        <version>0.21.0</version>
+        <version>0.21.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>refaster-support</artifactId>
diff --git a/refaster-test-support/pom.xml b/refaster-test-support/pom.xml
index 0f0fd4fa..9ef89c9a 100644
--- a/refaster-test-support/pom.xml
+++ b/refaster-test-support/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>tech.picnic.error-prone-support</groupId>
         <artifactId>error-prone-support</artifactId>
-        <version>0.21.0</version>
+        <version>0.21.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>refaster-test-support</artifactId>