diff --git a/environment.yml b/environment.yml
index 96257b2560..09ec1def63 100644
--- a/environment.yml
+++ b/environment.yml
@@ -8,7 +8,7 @@ dependencies:
   - cartopy
   - cf-units
   - cftime
-  - dask >=2025, !=2025.4.0  # github.com/ESMValGroup/ESMValCore/issues/2503, github.com/ESMValGroup/ESMValCore/issues/2716
+  - dask >=2025, <2025.4.0  # github.com/ESMValGroup/ESMValCore/issues/2503, github.com/ESMValGroup/ESMValCore/issues/2716
   - dask-jobqueue
   - distributed
   - esgf-pyclient >=0.3.1
diff --git a/pyproject.toml b/pyproject.toml
index a96143437d..fab2e3be2c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ dynamic = [
 dependencies = [
     "cartopy",
     "cf-units",
-    "dask[array,distributed]>=2025,!=2025.4.0",  # Core/issues/2503 and 2716
+    "dask[array,distributed]>=2025,<2025.4.0",  # Core/issues/2503 and 2716
     "dask-jobqueue",
     "esgf-pyclient>=0.3.1",
     "esmf-regrid>=0.11.0",