diff --git a/VERSION b/VERSION
index 78c8a7428..b2fb78a91 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.17
+3.18
diff --git a/setup.py b/setup.py
index c00eeafbe..5c924fe4e 100644
--- a/setup.py
+++ b/setup.py
@@ -501,7 +501,7 @@ if 'BT_USE_EGL' in EGL_CXX_FLAGS:
 
 setup(
     name='pybullet',
-    version='3.1.7',
+    version='3.1.8',
     description=
     'Official Python Interface for the Bullet Physics SDK specialized for Robotics Simulation and Reinforcement Learning',
     long_description=
diff --git a/src/LinearMath/btScalar.h b/src/LinearMath/btScalar.h
index b239217bb..a677a7b96 100644
--- a/src/LinearMath/btScalar.h
+++ b/src/LinearMath/btScalar.h
@@ -25,7 +25,7 @@ subject to the following restrictions:
 #include <float.h>
 
 /* SVN $Revision$ on $Date$ from http://bullet.googlecode.com*/
-#define BT_BULLET_VERSION 317
+#define BT_BULLET_VERSION 318
 
 inline int btGetVersion()
 {
diff --git a/src/LinearMath/btSerializer.h b/src/LinearMath/btSerializer.h
index ce4fc34e2..924daed52 100644
--- a/src/LinearMath/btSerializer.h
+++ b/src/LinearMath/btSerializer.h
@@ -481,7 +481,7 @@ public:
 
 		buffer[9] = '3';
 		buffer[10] = '1';
-		buffer[11] = '7';
+		buffer[11] = '8';
 	}
 
 	virtual void startSerialization()