diff --git a/requirements.txt b/requirements.txt
index b048e56..63b0408 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ plaster-pastedeploy==0.7
 pycparser==2.19
 pyramid==1.10.4
 pyramid-multiauth==0.9.0
-pyramid-tm==2.2.1
+pyramid-tm==2.4
 python-dateutil==2.8.0
 repoze.lru==0.7
 requests==2.21.0