diff --git a/Makefile b/Makefile
index 3627909..014ea4a 100644
--- a/Makefile
+++ b/Makefile
@@ -32,7 +32,7 @@ DEVPKGS=diff_cover black pylint pep257 pydocstyle flake8 tox tox-pyenv \
 	-rtest-requirements.txt -rmypy-requirements.txt
 DEBDEVPKGS=pylint python3-coverage sloccount \
 	   python3-flake8 shellcheck
-VERSION=1.2.5  # please also update setup.py
+VERSION=1.2.6  # please also update setup.py
 
 ## all                    : default task (install cwl-upgrader in dev mode)
 all: dev
diff --git a/requirements.txt b/requirements.txt
index 2c1a664..8a4796e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
-ruamel.yaml >= 0.16.0, < 0.17.22;python_version>='3.10'
-ruamel.yaml >= 0.15.98, < 0.17.22;python_version>='3.9'
-ruamel.yaml >= 0.15.78, < 0.17.22;python_version>='3.8'
+ruamel.yaml >= 0.16.0, < 0.17.23;python_version>='3.10'
+ruamel.yaml >= 0.15.98, < 0.17.23;python_version>='3.9'
+ruamel.yaml >= 0.15.78, < 0.17.23;python_version>='3.8'
 ruamel.yaml >= 0.15.71, < 0.17.23
 schema-salad
diff --git a/setup.py b/setup.py
index 69bab9d..f514cfb 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
 
 setup(
     name="cwl-upgrader",
-    version="1.2.5",
+    version="1.2.6",
     description="Common Workflow Language standalone document upgrader",
     long_description=open(README).read(),
     author="Common Workflow Language contributors",
@@ -27,9 +27,9 @@
     package_data={"cwlupgrader.tests": ["../testdata/**/*.cwl"]},
     install_requires=[
         "setuptools",
-        "ruamel.yaml >= 0.16.0, < 0.17.22;python_version>='3.10'",
-        "ruamel.yaml >= 0.15.98, < 0.17.22;python_version>='3.9'",
-        "ruamel.yaml >= 0.15.78, < 0.17.22;python_version>='3.8'",
+        "ruamel.yaml >= 0.16.0, < 0.17.23;python_version>='3.10'",
+        "ruamel.yaml >= 0.15.98, < 0.17.23;python_version>='3.9'",
+        "ruamel.yaml >= 0.15.78, < 0.17.23;python_version>='3.8'",
         "ruamel.yaml >= 0.15.71, < 0.17.23",
         "schema_salad",
     ],