diff --git a/.travis.yml b/.travis.yml
index fdf11a023..31df1f8f4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,7 +25,7 @@ addons:
 
 install:
     - pip3 install ed25519 pyblake2
-    - pip2 install mnemonic protobuf requests
+    - pip2 install ecdsa mnemonic protobuf requests
 
 script:
   - test "$GOAL" != "stm32" || test "$CC" != "gcc" || make vendorheader