diff --git a/README.md b/README.md
index 6cf5d99..5d2c21f 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Signatures uniquely encode 3D pharmacophores with hashes suitable for fast ident
 ## Dependency
 
 `rdkit >= 2017.09`  
-`networkx >= 1.11`
+`networkx >= 2`
 
 ## Installation
 ```text
diff --git a/pmapper/__init__.py b/pmapper/__init__.py
index f29a3a5..442b924 100644
--- a/pmapper/__init__.py
+++ b/pmapper/__init__.py
@@ -8,4 +8,4 @@
 # license         : 
 #==============================================================================
 
-__version__ = '0.3'
+__version__ = '0.3.1'