diff --git a/setup.py b/setup.py
index 9ec7efe..e63f348 100644
--- a/setup.py
+++ b/setup.py
@@ -21,6 +21,9 @@ PDF parser that can be used for other purposes instead of text analysis.''',
     packages=[
     'pdfminer',
     ],
+    package_data={
+    'pdfminer': ['cmap/*.pickle.gz']
+    },
     scripts=[
     'tools/pdf2txt.py',
     'tools/dumppdf.py',