diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 805ae8bd..216c7c3b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -38,7 +38,7 @@ jobs:
 
         strategy:
             matrix:
-                python-version: ['3.8', '3.9', '3.10']
+                python-version: ['3.8', '3.9']
 
         services:
             rabbitmq:
diff --git a/pyproject.toml b/pyproject.toml
index 9e4c2a1a..c69c70ab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,12 +17,11 @@ classifiers = [
     'Programming Language :: Python',
     'Programming Language :: Python :: 3.8',
     'Programming Language :: Python :: 3.9',
-    'Programming Language :: Python :: 3.10',
 ]
 keywords = ['aiida', 'workflows']
-requires-python = '>=3.8'
+requires-python = '>=3.8,<3.10'
 dependencies = [
-    'abipy',
+    'abipy==0.9.6',
     'aiida-abinit~=0.4.0',
     'aiida-bigdft>=0.2.6',
     'aiida-castep>=1.2.0a5',