diff --git a/easybuild/easyconfigs/c/cp2k-input-tools/cp2k-input-tools-0.9.1-foss-2023a.eb b/easybuild/easyconfigs/c/cp2k-input-tools/cp2k-input-tools-0.9.1-foss-2023a.eb
index c8a73dff94f1..6e8baed0be5d 100644
--- a/easybuild/easyconfigs/c/cp2k-input-tools/cp2k-input-tools-0.9.1-foss-2023a.eb
+++ b/easybuild/easyconfigs/c/cp2k-input-tools/cp2k-input-tools-0.9.1-foss-2023a.eb
@@ -22,9 +22,12 @@ dependencies = [
 use_pip = True
 
 exts_list = [
-    ('transitions', '0.9.2'),
+    ('transitions', '0.9.2', {
+        'checksums': ['2f8490dbdbd419366cef1516032ab06d07ccb5839ef54905e842a472692d4204'],
+    }),
     (name, version, {
         'sources': ['cp2k_input_tools-%(version)s.tar.gz'],
+        'checksums': ['bf7d229bbcfa41b1caaa32e7eb3c1c689d56bd1cbd4de674bd2fde8de4efb27c'],
     }),
 ]