diff --git a/chains/v20/chains.json b/chains/v20/chains.json
index f34af38e2..974babfe2 100644
--- a/chains/v20/chains.json
+++ b/chains/v20/chains.json
@@ -1223,7 +1223,7 @@
         "additional": {
             "themeColor": "#9968CE",
             "stakingWiki": "https://docs.novawallet.io/nova-wallet-wiki/staking/moonbeam-glmr-staking",
-            "defaultBlockTime": 12000
+            "defaultBlockTime": 6000
         }
     },
     {
diff --git a/chains/v20/chains_dev.json b/chains/v20/chains_dev.json
index 215ffb449..1eb501675 100644
--- a/chains/v20/chains_dev.json
+++ b/chains/v20/chains_dev.json
@@ -3696,7 +3696,7 @@
         "additional": {
             "themeColor": "#9968CE",
             "stakingWiki": "https://docs.novawallet.io/nova-wallet-wiki/staking/moonbeam-glmr-staking",
-            "defaultBlockTime": 12000
+            "defaultBlockTime": 6000
         }
     },
     {