diff --git a/build.gradle b/build.gradle
index ed6149acbf..305b9bacae 100644
--- a/build.gradle
+++ b/build.gradle
@@ -37,7 +37,7 @@ allprojects {
 	maven { url "http://repo.terracotta.org/maven2/" }
 	}
 
-	eclipse.project.name = "${project.name}-4.0.x"
+	eclipse.project.name = "${project.name}-4.1.x"
 }
 
 sonarRunner {
diff --git a/core/src/main/java/org/springframework/security/core/SpringSecurityCoreVersion.java b/core/src/main/java/org/springframework/security/core/SpringSecurityCoreVersion.java
index fd3fbbefe8..4a27ab1167 100644
--- a/core/src/main/java/org/springframework/security/core/SpringSecurityCoreVersion.java
+++ b/core/src/main/java/org/springframework/security/core/SpringSecurityCoreVersion.java
@@ -22,7 +22,7 @@ public class SpringSecurityCoreVersion {
 	 * N.B. Classes are not intended to be serializable between different versions. See
 	 * SEC-1709 for why we still need a serial version.
 	 */
-	public static final long SERIAL_VERSION_UID = 400L;
+	public static final long SERIAL_VERSION_UID = 410L;
 
 	static final String MIN_SPRING_VERSION = "4.1.6.RELEASE";
 
diff --git a/gradle.properties b/gradle.properties
index 557f683b0c..9e5b62b270 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1 +1 @@
-version=4.0.3.CI-SNAPSHOT
+version=4.1.0.BUILD-SNAPSHOT
diff --git a/taglibs/src/main/resources/META-INF/security.tld b/taglibs/src/main/resources/META-INF/security.tld
index f8ecf59892..a883fb5a45 100644
--- a/taglibs/src/main/resources/META-INF/security.tld
+++ b/taglibs/src/main/resources/META-INF/security.tld
@@ -20,7 +20,7 @@
         version="2.0">
     <description>Spring Security Authorization Tag Library</description>
 
-    <tlib-version>4.0</tlib-version>
+    <tlib-version>4.1</tlib-version>
     <short-name>security</short-name>
     <uri>http://www.springframework.org/security/tags</uri>