diff --git a/packages/core/src/Serialization/Common/ProtocolVersion.ts b/packages/core/src/Serialization/Common/ProtocolVersion.ts
index 90bf9840537..1de3d7e298e 100644
--- a/packages/core/src/Serialization/Common/ProtocolVersion.ts
+++ b/packages/core/src/Serialization/Common/ProtocolVersion.ts
@@ -38,9 +38,9 @@ export class ProtocolVersion {
     if (this.#originalBytes) return this.#originalBytes;
 
     // CDDL
-    // next_major_protocol_version = 9
+    // next_major_protocol_version = 10
     // major_protocol_version = 1..next_major_protocol_version
-    // protocol_version = (major_protocol_version, uint32)
+    // protocol_version = [(major_protocol_version, uint32)]
     writer.writeStartArray(PROTOCOL_VERSION_ARRAY_SIZE);
     writer.writeInt(this.#major);
     writer.writeInt(this.#minor);
diff --git a/packages/core/src/Serialization/TransactionBody/ProposalProcedure/HardForkInitiationAction.ts b/packages/core/src/Serialization/TransactionBody/ProposalProcedure/HardForkInitiationAction.ts
index eecadd7f12d..da7c9ff07d2 100644
--- a/packages/core/src/Serialization/TransactionBody/ProposalProcedure/HardForkInitiationAction.ts
+++ b/packages/core/src/Serialization/TransactionBody/ProposalProcedure/HardForkInitiationAction.ts
@@ -36,7 +36,7 @@ export class HardForkInitiationAction {
     if (this.#originalBytes) return this.#originalBytes;
 
     // CDDL
-    // hard_fork_initiation_action = (1, gov_action_id / null, [protocol_version])
+    // hard_fork_initiation_action = (1, gov_action_id / null, protocol_version)
     writer.writeStartArray(EMBEDDED_GROUP_SIZE);
     writer.writeInt(GovernanceActionKind.HardForkInitiation);
     this.#govActionId ? writer.writeEncodedValue(hexToBytes(this.#govActionId.toCbor())) : writer.writeNull();