diff --git a/emerald-grpc b/emerald-grpc
index d8067885..ac3d5f35 160000
--- a/emerald-grpc
+++ b/emerald-grpc
@@ -1 +1 @@
-Subproject commit d8067885f585346522e4f7f7f9754049e67918bd
+Subproject commit ac3d5f3593bcb0349773e344a4b0815f6d5994eb
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/rpc/StreamHead.kt b/src/main/kotlin/io/emeraldpay/dshackle/rpc/StreamHead.kt
index 72e50959..df9b14e3 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/rpc/StreamHead.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/rpc/StreamHead.kt
@@ -96,6 +96,7 @@ class StreamHead(
             LowerBoundType.UNKNOWN -> BlockchainOuterClass.LowerBoundType.LOWER_BOUND_UNSPECIFIED
             LowerBoundType.STATE -> BlockchainOuterClass.LowerBoundType.LOWER_BOUND_STATE
             LowerBoundType.BLOCK -> BlockchainOuterClass.LowerBoundType.LOWER_BOUND_BLOCK
+            LowerBoundType.TX -> BlockchainOuterClass.LowerBoundType.LOWER_BOUND_TX
         }
     }
 
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/lowerbound/LowerBoundData.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/lowerbound/LowerBoundData.kt
index 2ce89f64..99e3e473 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/lowerbound/LowerBoundData.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/lowerbound/LowerBoundData.kt
@@ -20,7 +20,7 @@ data class LowerBoundData(
 }
 
 enum class LowerBoundType {
-    UNKNOWN, STATE, SLOT, BLOCK
+    UNKNOWN, STATE, SLOT, BLOCK, TX
 }
 
 fun BlockchainOuterClass.LowerBoundType.fromProtoType(): LowerBoundType {
@@ -30,5 +30,6 @@ fun BlockchainOuterClass.LowerBoundType.fromProtoType(): LowerBoundType {
         BlockchainOuterClass.LowerBoundType.LOWER_BOUND_STATE -> LowerBoundType.STATE
         BlockchainOuterClass.LowerBoundType.LOWER_BOUND_BLOCK -> LowerBoundType.BLOCK
         BlockchainOuterClass.LowerBoundType.UNRECOGNIZED -> LowerBoundType.UNKNOWN
+        BlockchainOuterClass.LowerBoundType.LOWER_BOUND_TX -> LowerBoundType.TX
     }
 }