diff --git a/README.md b/README.md
index 58cafe5..cc80b43 100644
--- a/README.md
+++ b/README.md
@@ -19,9 +19,10 @@ This project uses a semver-parsable X.0.Z version number for releases, where X i
 Non-release versions of this project (for example on github.com/RuntimeTools/omr-agentcore) will use semver-parsable X.0.Z-dev.B version numbers, where X.0.Z is the last release with Z incremented and B is an integer. For further information on the development process go to the  [appmetrics wiki][3]: [Developing](https://github.com/RuntimeTools/appmetrics/wiki/Developing).
 
 ## Version
-3.2.9
+4.0.0
 
 ## Release History
+`4.0.0` - Fixes for z/OS API connections and semaphore reuse.  
 `3.2.9` - Build fixes for Node 10.  
 `3.2.8` - Initial support for iPASE systems.  
 `3.2.7` - Bug fix - common itoa mangling decimals (Windows only).  
diff --git a/binding.gyp b/binding.gyp
index 1f82afa..49b8222 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -5,7 +5,7 @@
 #    "externalbinariesdir%": "<(PRODUCT_DIR)/deploy/external/binaries",
     "externalbinariesdir%": "./plugins",
     'build_id%': '.<!(["python", "./generate_build_id.py"])',
-    'coreversion%': '3.2.9',
+    'coreversion%': '4.0.0',
     "conditions": [
       ['OS=="aix"', {
         "portdir": "aix",
diff --git a/src/ibmras/monitoring/agent/Agent.cpp b/src/ibmras/monitoring/agent/Agent.cpp
index ecc86fc..52d69a0 100644
--- a/src/ibmras/monitoring/agent/Agent.cpp
+++ b/src/ibmras/monitoring/agent/Agent.cpp
@@ -192,7 +192,7 @@ std::string Agent::getBuildDate() {
 }
 
 std::string Agent::getVersion() {
-	return "3.2.9";
+	return "4.0.0";
 }
 
 void Agent::setLogLevels() {