diff --git a/.gitignore b/.gitignore
index daddd59495..9152c4d3ee 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,4 +16,8 @@
 
 # Python Tools for Visual Studio (PTVS)
 __pycache__/
-*.pyc
\ No newline at end of file
+*.pyc
+
+# Ignore certificate files.
+*.pem
+*.crt