diff --git a/ci/pyinstaller.spec b/ci/pyinstaller.spec
index c62505ae..785db528 100644
--- a/ci/pyinstaller.spec
+++ b/ci/pyinstaller.spec
@@ -1,7 +1,14 @@
 # -*- mode: python -*-
 import os.path
+import subprocess
+
 import wcwidth
 
+
+with open('./capa/version.py', 'wb') as f:
+    f.write("__version__ = '%s'"
+            % subprocess.check_output(["git", "describe", "--always"]).strip())
+
 a = Analysis(
     ['../capa/main.py'],
     pathex=['capa'],