diff --git a/environment.yml b/environment.yml
index f6657b17536641cd918ae39457b0db3f353df7b2..2808ec2de3f7302042c66b5b8e0ef9cfcf6826b4 100644
--- a/environment.yml
+++ b/environment.yml
@@ -5,9 +5,9 @@ channels:
 - conda-forge
 
 dependencies:
-- python=3.7.4
+- python<3.9
 - cdo
 - nco
 - eccodes
 - six
-- iris>=2.4
+- iris>=3.0.1
diff --git a/setup.py b/setup.py
index 6361e20a5c6041630e668555f2257fa69779ee84..074466cb9a296496ea59464b126801cedc7c1c83 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@ REQUIREMENTS = {
     ],
     "install": [
         "bscearth.utils",
-        "cdo>=1.3.4",
+        "cdo==1.5.3",
         "cfgrib",
         "dask[array]",
         "diagonals>=0.3.2",
@@ -31,7 +31,7 @@ REQUIREMENTS = {
         "numpy",
         "psutil",
         "openpyxl",
-        "scitools-iris>=2.4",
+        "scitools-iris>=3.0.1",
         "six",
         "xxhash",
     ],