diff --git a/annotation/pom.xml b/annotation/pom.xml
index 276a3e847..c47bca85a 100644
--- a/annotation/pom.xml
+++ b/annotation/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>com.github.cowwoc.requirements</groupId>
 		<artifactId>root</artifactId>
-		<version>9.0.0</version>
+		<version>9.0.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>annotation</artifactId>
 	<packaging>jar</packaging>
diff --git a/benchmark/assertj/pom.xml b/benchmark/assertj/pom.xml
index 16d73603e..0b761544c 100644
--- a/benchmark/assertj/pom.xml
+++ b/benchmark/assertj/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>com.github.cowwoc.requirements</groupId>
 		<artifactId>benchmark</artifactId>
-		<version>9.0.0</version>
+		<version>9.0.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>benchmark.assertj</artifactId>
 	<packaging>jar</packaging>
diff --git a/benchmark/guava/pom.xml b/benchmark/guava/pom.xml
index ab743fee8..d81363f15 100644
--- a/benchmark/guava/pom.xml
+++ b/benchmark/guava/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>com.github.cowwoc.requirements</groupId>
 		<artifactId>benchmark</artifactId>
-		<version>9.0.0</version>
+		<version>9.0.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>benchmark.guava</artifactId>
 	<packaging>jar</packaging>
diff --git a/benchmark/java/pom.xml b/benchmark/java/pom.xml
index 6d2964ba0..44dce7149 100644
--- a/benchmark/java/pom.xml
+++ b/benchmark/java/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>com.github.cowwoc.requirements</groupId>
 		<artifactId>benchmark</artifactId>
-		<version>9.0.0</version>
+		<version>9.0.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>benchmark.java</artifactId>
 	<packaging>jar</packaging>
diff --git a/benchmark/pom.xml b/benchmark/pom.xml
index 644339fe6..d02e63a77 100644
--- a/benchmark/pom.xml
+++ b/benchmark/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>com.github.cowwoc.requirements</groupId>
 		<artifactId>root</artifactId>
-		<version>9.0.0</version>
+		<version>9.0.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>benchmark</artifactId>
 	<packaging>pom</packaging>
diff --git a/guava/pom.xml b/guava/pom.xml
index afcccf49a..be15cb5ef 100644
--- a/guava/pom.xml
+++ b/guava/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>com.github.cowwoc.requirements</groupId>
 		<artifactId>root</artifactId>
-		<version>9.0.0</version>
+		<version>9.0.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>guava</artifactId>
 	<packaging>jar</packaging>
diff --git a/jackson/pom.xml b/jackson/pom.xml
index e2669b5c6..8d9a00526 100644
--- a/jackson/pom.xml
+++ b/jackson/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>com.github.cowwoc.requirements</groupId>
 		<artifactId>root</artifactId>
-		<version>9.0.0</version>
+		<version>9.0.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>jackson</artifactId>
 	<packaging>jar</packaging>
diff --git a/java/pom.xml b/java/pom.xml
index 7a5392083..a62e7eecd 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>com.github.cowwoc.requirements</groupId>
 		<artifactId>root</artifactId>
-		<version>9.0.0</version>
+		<version>9.0.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>java</artifactId>
 	<packaging>jar</packaging>
diff --git a/pom.xml b/pom.xml
index ade9861f2..1cd2e3e47 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.github.cowwoc.requirements</groupId>
 	<artifactId>root</artifactId>
-	<version>9.0.0</version>
+	<version>9.0.1-SNAPSHOT</version>
 	<packaging>pom</packaging>
 	<name>Requirements</name>
 	<description>A fluent API for enforcing design contracts with automatic message generation</description>
@@ -21,7 +21,7 @@
 		<url>https://github.com/cowwoc/requirements.java/</url>
 		<connection>scm:git:https://github.com/cowwoc/requirements.java/</connection>
 		<developerConnection>scm:git:https://github.com/cowwoc/requirements.java/</developerConnection>
-		<tag>release-9.0.0</tag>
+		<tag>HEAD</tag>
 	</scm>
 
 	<developers>
diff --git a/test/pom.xml b/test/pom.xml
index 382c4380f..6d769e4bc 100644
--- a/test/pom.xml
+++ b/test/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>com.github.cowwoc.requirements</groupId>
 		<artifactId>root</artifactId>
-		<version>9.0.0</version>
+		<version>9.0.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>test</artifactId>
 	<packaging>jar</packaging>
@@ -50,7 +50,7 @@
 		<dependency>
 			<groupId>com.github.cowwoc.requirements</groupId>
 			<artifactId>jackson</artifactId>
-			<version>9.0.0</version>
+			<version>9.0.1-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 	</dependencies>