diff --git a/requirements.txt b/requirements.txt
index 7f1ddadfdf..9f54fa6c48 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,4 +20,5 @@ beautifulsoup4>=4,<=4.6.3
 fuzzywuzzy>=0.11,<=0.17
 pyelftools>=0.24,<=0.25
 git+https://github.com/armmbed/manifest-tool.git@v1.4.6
+pyocd>=0.14,<0.15
 icetea>=1.0.2,<1.1