diff --git a/dev-requirements-py2.txt b/dev-requirements-py2.txt
index e591dfb4..a384617b 100644
--- a/dev-requirements-py2.txt
+++ b/dev-requirements-py2.txt
@@ -1,3 +1,3 @@
-pyfakefs==3.7.2
+pyfakefs==5.7.4
 pytest-ckan
 pytest-cov
diff --git a/dev-requirements.txt b/dev-requirements.txt
index 51697501..93969a3a 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,3 +1,3 @@
-pyfakefs==4.6.*
+pyfakefs==5.7.*
 pytest-ckan
 pytest-cov