diff --git a/emerald-grpc b/emerald-grpc
index 6f87a80a..27e6cbe7 160000
--- a/emerald-grpc
+++ b/emerald-grpc
@@ -1 +1 @@
-Subproject commit 6f87a80af99167a71a412e0f96167a304efcbb42
+Subproject commit 27e6cbe74ce4821af82d0977356fae119ffbc206
diff --git a/foundation/src/main/resources/chains.yaml b/foundation/src/main/resources/chains.yaml
index e03440e0..ed24565c 100644
--- a/foundation/src/main/resources/chains.yaml
+++ b/foundation/src/main/resources/chains.yaml
@@ -1351,6 +1351,24 @@ chain-settings:
           grpcId: 10068
           short-names: [arb-blueberry-testnet]
           chain-id: 0x14865d0f05
+    - id: polygon-blackberry
+      label: Polygon Blackberry
+      type: eth
+      settings:
+        fork-choice: quorum
+        expected-block-time: 15s
+        options:
+          validate-peers: false
+        lags:
+          syncing: 20
+          lagging: 10
+      chains:
+        - id: Testnet
+          priority: 10
+          code: POLYGON_BLACKBERRY_TESTNET
+          grpcId: 10072
+          short-names: [ polygon-blackberry-testnet ]
+          chain-id: 0x59d7131
     - id: dymension
       label: Dymension
       type: eth