diff --git a/.travis/build.sh b/.travis/build.sh
index 554932d06..3a268b52b 100755
--- a/.travis/build.sh
+++ b/.travis/build.sh
@@ -51,6 +51,7 @@ if [ "$NO_PYTHON" != 1 ]; then
 	 -r contrib/pyln-testing/requirements.txt
 
     pip3 install --user -U --quiet --progress-bar off \
+	 blinker \
 	 pytest-sentry \
 	 pytest-rerunfailures