diff --git a/requirements/dev.txt b/requirements/dev.txt
index 88862a88..215609c6 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -9,7 +9,7 @@ nicfit.py[cookiecutter]==0.7
 paver==1.2.4
 pip-tools==1.11.0
 pss==1.41
-pyaml==17.10.0
+pyaml==17.12.1
 sphinx-issues==0.4.0
 sphinx_rtd_theme==0.2.4
 sphinxcontrib-paverutils==1.16.0