diff --git a/include/slow5/slow5_defs.h b/include/slow5/slow5_defs.h
index 845df54..8fb27e6 100644
--- a/include/slow5/slow5_defs.h
+++ b/include/slow5/slow5_defs.h
@@ -44,7 +44,7 @@ The API documentation is available at https://hasindu2008.github.io/slow5tools/
 */
 
 // library version
-#define SLOW5_LIB_VERSION "1.2.0-beta"
+#define SLOW5_LIB_VERSION "1.2.0"
 
 // maximum file version supported by this library - independent of slow5 library version above
 // if updating change all 4 below
diff --git a/setup.py b/setup.py
index f07ce03..e409913 100644
--- a/setup.py
+++ b/setup.py
@@ -89,7 +89,7 @@ def readme():
 
 setup(
     name = 'pyslow5',
-    version='1.2.0-beta',
+    version='1.2.0',
     url = 'https://github.com/hasindu2008/slow5lib',
     description='slow5lib python bindings',
     long_description=readme(),