diff --git a/.gitignore b/.gitignore
index 356e77d..45a067a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -52,3 +52,4 @@ Session.vim
 .netrwhist
 *~
 
+/pipreqs/*.bak
diff --git a/pipreqs/pipreqs.py b/pipreqs/pipreqs.py
index a1f369e..f51f802 100755
--- a/pipreqs/pipreqs.py
+++ b/pipreqs/pipreqs.py
@@ -32,7 +32,7 @@ REGEXP = [
 def get_all_imports(path):
     imports = []
     candidates = []
-    ignore_dirs = [".git", "__pycache__", "env"]
+    ignore_dirs = [".hg", ".svn", ".git", "__pycache__", "env"]
 
     for root, dirs, files in os.walk(path):
         dirs[:] = [d for d in dirs if d not in ignore_dirs]