diff --git a/packages/common/src/TimeUtils.ts b/packages/common/src/TimeUtils.ts
index 5f6ec3b4cc..d284ce98d2 100644
--- a/packages/common/src/TimeUtils.ts
+++ b/packages/common/src/TimeUtils.ts
@@ -16,10 +16,13 @@ export async function averageBlockTimeSeconds(chainId?: number): Promise<number>
     throw "Missing default block time value";
   }
 
+  // - Optimism- Bedrock produces blocks every 2 seconds
+  //   https://community.optimism.io/docs/developers/bedrock/how-is-bedrock-different/#block-production
+  // - Polygon source: https://polygonscan.com/chart/blocktime
+
   switch (chainId) {
-    // Source: https://polygonscan.com/chart/blocktime
     case 10:
-      return 0.5;
+      return 2;
     case 42161:
       return 0.5;
     case 288: