diff --git a/build-requirements.txt b/build-requirements.txt
index 5d37ab8..4b17af9 100644
--- a/build-requirements.txt
+++ b/build-requirements.txt
@@ -3,7 +3,7 @@ chardet==3.0.4 --hash=sha256:9f178988ca4c86e8a319b51aac1185b6fe5192328eb5a163c28
 furl==2.0.0 --hash=sha256:cc0eb8998dcc7c5b58bc8625891a9ff563e2765e112024fa3d1e3521481de8b6
 idna==2.7 --hash=sha256:954e65e127d0433a352981f43f291a438423d5b385ebf643c70fd740e0634111
 orderedmultidict==1.0 --hash=sha256:25489716d76d2cc8aa656bfb00cd40b6ca29d5e11ccde0db60c2b46ad52bb40a
-pyyaml==5.1 --hash=sha256:b8d80623e9d4e348c59ea726ce3032a2eb15abca6a48d3828362d11c6014a0a7
+pyyaml==5.1 --hash=sha256:b8d80623e9d4e348c59ea726ce3032a2eb15abca6a48d3828362d11c6014a0a7 --hash=sha256:c6dec5d6ffa44a50d83b9c4e8df0443a0a87e4213ecf2e24fcae6ea991f3b0c0
 requests==2.20.0 --hash=sha256:2a539dd6af40a611f3b8eb3f99d3567781352ece1698b2fab42bf4c2218705b5
 six==1.11.0 --hash=sha256:4663c7a1dbed033cfb294f2d534bd6151c0698dc12ecabb4eaa3cb041d758528
 urllib3==1.24.3 --hash=sha256:028309393606e28e640e2031edd27eb969c94f9364b0871912608aaa8e66c96e