diff --git a/mypy-requirements.txt b/mypy-requirements.txt
index 89e0f70f7..2b71dc144 100644
--- a/mypy-requirements.txt
+++ b/mypy-requirements.txt
@@ -1,6 +1,5 @@
 mypy==1.3.0  # also update pyproject.toml
 ruamel.yaml>=0.16.0,<0.18
-schema-salad>=8.4,<9
 cwl-utils>=0.22
 types-requests
 types-setuptools
diff --git a/pyproject.toml b/pyproject.toml
index d506aed14..70b985255 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ requires = [
     "types-psutil",
     "importlib_resources>=1.4",  # equivalent to Python 3.9
     "ruamel.yaml>=0.16.0,<0.18",
-    "schema-salad>=8.2.20211104054942,<9",
+    "schema-salad>=8.4.20230426093816,<9",
     "cwl-utils>=0.19",
     "toml",
     "argcomplete>=1.12.0",
diff --git a/requirements.txt b/requirements.txt
index 87797407b..d92936b34 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ ruamel.yaml>=0.15.0,<0.18
 ruamel.yaml>=0.16;python_version>='3.10'
 rdflib>=4.2.2,<7.1
 shellescape>=3.4.1,<3.9
-schema-salad>=8.4,<9
+schema-salad>=8.4.20230426093816,<9
 prov==1.5.1
 mypy-extensions
 psutil>=5.6.6
diff --git a/setup.py b/setup.py
index 2fd22dd99..a86b1a4ad 100644
--- a/setup.py
+++ b/setup.py
@@ -116,7 +116,7 @@
         "ruamel.yaml >= 0.16.0;python_version>='3.10'",
         "rdflib >= 4.2.2, < 7.1.0",
         "shellescape >= 3.4.1, < 3.9",
-        "schema-salad >= 8.4, < 9",
+        "schema-salad >= 8.4.20230426093816, < 9",
         "prov == 1.5.1",
         "mypy-extensions",
         "psutil >= 5.6.6",