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-rw-r--r--requirements.txt2
1 files changed, 1 insertions, 1 deletions
diff --git a/requirements.txt b/requirements.txt
index 2b009652..b7a0ae27 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
# of appearance. Changing the order has an impact on the overall integration
# process, which may cause wedges in the gate later.
six>=1.9.0 # MIT
-PyYAML>=3.10.0 # MIT
+PyYAML>=3.10.0,<4 # MIT
pbr>=1.8 # Apache-2.0
stevedore>=1.17.1 # Apache-2.0
python-jenkins>=0.4.15