diff --git a/requirements-ci.txt b/requirements-ci.txt
index f4b54081b37..4cb3c999149 100644
--- a/requirements-ci.txt
+++ b/requirements-ci.txt
@@ -77,7 +77,7 @@ sqlparse==0.2.4
 Tempita==0.5.2
 termcolor==1.1.0
 toml==0.9.4
-towncrier==18.6.0
+towncrier==18.5.0
 treq==18.6.0
 Twisted==18.7.0
 txaio==18.7.1
diff --git a/requirements-cidocs.txt b/requirements-cidocs.txt
index a610db0e6bb..6b0d8f5b3f3 100644
--- a/requirements-cidocs.txt
+++ b/requirements-cidocs.txt
@@ -4,4 +4,4 @@ sphinxcontrib-blockdiag==1.5.5
 sphinxcontrib-spelling==4.2.0
 sphinxcontrib-websupport==1.1.0
 Pygments==2.2.0
-towncrier==18.6.0
+towncrier==18.5.0