diff --git a/common/lib/capa/setup.py b/common/lib/capa/setup.py
index cf66229b88..15b3015930 100644
--- a/common/lib/capa/setup.py
+++ b/common/lib/capa/setup.py
@@ -4,5 +4,5 @@ setup(
     name="capa",
     version="0.1",
     packages=find_packages(exclude=["tests"]),
-    install_requires=['distribute'],
+    install_requires=['distribute', 'pyparsing'],
 )