diff --git a/requirements.txt b/requirements.txt
index ab94f47bb..b20f0e46c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 requests>=2.4.3
-ruamel.yaml>=0.15,<0.17.11
+ruamel.yaml>=0.15,<0.17.22
 rdflib>=4.2.2,<6.1
 shellescape>=3.4.1,<3.9
 schema-salad>=8.1.20210627200047,<9
diff --git a/setup.py b/setup.py
index bf1398f97..5be77bd4a 100644
--- a/setup.py
+++ b/setup.py
@@ -108,7 +108,7 @@
         "setuptools",
         "requests >= 2.6.1",  # >= 2.6.1 to workaround
         # https://github.com/ionrock/cachecontrol/issues/137
-        "ruamel.yaml >= 0.15, < 0.17.11",
+        "ruamel.yaml >= 0.15, < 0.17.22",
         "rdflib >= 4.2.2, < 6.1.0",
         "shellescape >= 3.4.1, < 3.9",
         # 7.1.20210518142926 or later required due to