diff --git a/conda/meta.yaml b/conda/meta.yaml
index 04dd29678..5717bc4c1 100644
--- a/conda/meta.yaml
+++ b/conda/meta.yaml
@@ -22,7 +22,7 @@ requirements:
     - ipython
     - typing_extensions
     - nlopt
-    - multimethod >=1.11,<2.0
+    - multimethod >=2.1,<3.0
     - casadi
     - runtype
     - numba
diff --git a/environment.yml b/environment.yml
index 4608af03b..e560f62a5 100644
--- a/environment.yml
+++ b/environment.yml
@@ -18,7 +18,7 @@ dependencies:
   - nlopt
   - casadi
   - runtype
-  - multimethod >=1.11,<2.0
+  - multimethod>=2.1,<3.0
   - typed-ast
   - regex
   - pathspec
diff --git a/setup.py b/setup.py
index e767ed1d0..aea3580a4 100644
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,7 @@
     reqs = [
         "cadquery-ocp>=7.9.3.1,<8.0",
         "ezdxf>=1.3.0",
-        "multimethod>=1.11,<2.0",
+        "multimethod>=2.1,<3.0",
         "nlopt>=2.9.0,<3.0",
         "runtype",
         "casadi",