diff --git a/Sources/FuzzILTool/main.swift b/Sources/FuzzILTool/main.swift
index ecbe04e3e..d95bb9e93 100644
--- a/Sources/FuzzILTool/main.swift
+++ b/Sources/FuzzILTool/main.swift
@@ -36,7 +36,7 @@ let filteredFunctionsForCompiler = [
 // Loads a serialized FuzzIL program from the given file
 func loadProgram(from path: String) throws -> Program {
     let data = try Data(contentsOf: URL(fileURLWithPath: path))
-    let proto = try Fuzzilli_Protobuf_Program(serializedData: data)
+    let proto = try Fuzzilli_Protobuf_Program(serializedBytes: data)
     let program = try Program(from: proto)
     return program
 }
@@ -147,7 +147,7 @@ else if args.has("--liftCorpusToJS") {
 // This allows the debugging of produced programs that are not syntactically valid
 else if args.has("--dumpProtobuf") {
     let data = try Data(contentsOf: URL(fileURLWithPath: path))
-    let proto = try Fuzzilli_Protobuf_Program(serializedData: data)
+    let proto = try Fuzzilli_Protobuf_Program(serializedBytes: data)
     dump(proto, maxDepth: 3)
 }
 
diff --git a/Sources/Fuzzilli/Compiler/JavaScriptParser.swift b/Sources/Fuzzilli/Compiler/JavaScriptParser.swift
index 3d5061560..f6a12f15d 100644
--- a/Sources/Fuzzilli/Compiler/JavaScriptParser.swift
+++ b/Sources/Fuzzilli/Compiler/JavaScriptParser.swift
@@ -53,7 +53,7 @@ public class JavaScriptParser {
         try runParserScript(withArguments: [astProtobufDefinitionPath, path, outputFilePath])
         let data = try Data(contentsOf: URL(fileURLWithPath: outputFilePath))
         try FileManager.default.removeItem(atPath: outputFilePath)
-        return try AST(serializedData: data)
+        return try AST(serializedBytes: data)
     }
 
     private func runParserScript(withArguments arguments: [String]) throws {
diff --git a/Sources/Fuzzilli/Modules/Sync.swift b/Sources/Fuzzilli/Modules/Sync.swift
index 241b5f429..608ebae65 100644
--- a/Sources/Fuzzilli/Modules/Sync.swift
+++ b/Sources/Fuzzilli/Modules/Sync.swift
@@ -154,7 +154,7 @@ public class DistributedFuzzingNode {
     /// and importing instances need to be configured identically, see above.
     func synchronizeState(to data: Data) throws {
         if supportsFastStateSynchronization {
-            let state = try Fuzzilli_Protobuf_FuzzerState(serializedData: data)
+            let state = try Fuzzilli_Protobuf_FuzzerState(serializedBytes: data)
             try fuzzer.corpus.importState(state.corpus)
             try fuzzer.evaluator.importState(state.evaluatorState)
         } else {
@@ -236,7 +236,7 @@ public class DistributedFuzzingParentNode: DistributedFuzzingNode, Module {
 
         case .crashingProgram:
             do {
-                let proto = try Fuzzilli_Protobuf_Program(serializedData: data)
+                let proto = try Fuzzilli_Protobuf_Program(serializedBytes: data)
                 let program = try Program(from: proto)
                 fuzzer.importCrash(program, origin: .child(id: child))
             } catch {
@@ -250,7 +250,7 @@ public class DistributedFuzzingParentNode: DistributedFuzzingNode, Module {
             }
 
             do {
-                let proto = try Fuzzilli_Protobuf_Program(serializedData: data)
+                let proto = try Fuzzilli_Protobuf_Program(serializedBytes: data)
                 let program = try Program(from: proto)
                 fuzzer.importProgram(program, enableDropout: false, origin: .child(id: child))
             } catch {
@@ -258,7 +258,7 @@ public class DistributedFuzzingParentNode: DistributedFuzzingNode, Module {
             }
 
         case .statistics:
-            if let data = try? Fuzzilli_Protobuf_Statistics(serializedData: data) {
+            if let data = try? Fuzzilli_Protobuf_Statistics(serializedBytes: data) {
                 if let stats = Statistics.instance(for: fuzzer) {
                     stats.importData(data, from: child)
                 }
@@ -267,7 +267,7 @@ public class DistributedFuzzingParentNode: DistributedFuzzingNode, Module {
             }
 
         case .log:
-            if let proto = try? Fuzzilli_Protobuf_LogMessage(serializedData: data),
+            if let proto = try? Fuzzilli_Protobuf_LogMessage(serializedBytes: data),
                let origin = UUID(uuidString: proto.origin),
                let level = LogLevel(rawValue: Int(clamping: proto.level)) {
                 fuzzer.dispatchEvent(fuzzer.events.Log, data: (origin: origin, level: level, label: proto.label, message: proto.content))
@@ -444,7 +444,7 @@ public class DistributedFuzzingChildNode: DistributedFuzzingNode, Module {
             }
 
             do {
-                let proto = try Fuzzilli_Protobuf_Program(serializedData: data)
+                let proto = try Fuzzilli_Protobuf_Program(serializedBytes: data)
                 let program = try Program(from: proto)
 
                 if messageType == .importedProgram {
diff --git a/Sources/Fuzzilli/Protobuf/ProtoUtils.swift b/Sources/Fuzzilli/Protobuf/ProtoUtils.swift
index 94d81d754..488e43639 100644
--- a/Sources/Fuzzilli/Protobuf/ProtoUtils.swift
+++ b/Sources/Fuzzilli/Protobuf/ProtoUtils.swift
@@ -113,7 +113,7 @@ public func decodeProtobufCorpus(_ buffer: Data) throws -> [Program]{
         }
         let data = buffer.subdata(in: offset..<offset+size)
         offset += size + align(size, to: 4)
-        let proto = try Fuzzilli_Protobuf_Program(serializedData: data)
+        let proto = try Fuzzilli_Protobuf_Program(serializedBytes: data)
         let program = try Program(from: proto, opCache: opCache)
         newPrograms.append(program)
     }
diff --git a/Sources/FuzzilliCli/main.swift b/Sources/FuzzilliCli/main.swift
index 69d47daa3..6c5cb3d65 100644
--- a/Sources/FuzzilliCli/main.swift
+++ b/Sources/FuzzilliCli/main.swift
@@ -347,7 +347,7 @@ func loadCorpus(from dirPath: String) -> [Program] {
         let path = dirPath + "/" + filename
         do {
             let data = try Data(contentsOf: URL(fileURLWithPath: path))
-            let pb = try Fuzzilli_Protobuf_Program(serializedData: data)
+            let pb = try Fuzzilli_Protobuf_Program(serializedBytes: data)
             let program = try Program.init(from: pb)
             if !program.isEmpty {
                 programs.append(program)
diff --git a/Tests/FuzzilliTests/ProgramSerializationTest.swift b/Tests/FuzzilliTests/ProgramSerializationTest.swift
index 00aecab6f..b7ba291b5 100644
--- a/Tests/FuzzilliTests/ProgramSerializationTest.swift
+++ b/Tests/FuzzilliTests/ProgramSerializationTest.swift
@@ -33,8 +33,8 @@ class ProgramSerializationTests: XCTestCase {
             let data1 = try! proto1.serializedData()
             let data2 = try! proto2.serializedData()
 
-            proto1 = try! Fuzzilli_Protobuf_Program(serializedData: data1)
-            proto2 = try! Fuzzilli_Protobuf_Program(serializedData: data2)
+            proto1 = try! Fuzzilli_Protobuf_Program(serializedBytes: data1)
+            proto2 = try! Fuzzilli_Protobuf_Program(serializedBytes: data2)
             XCTAssertEqual(proto1, proto2)
 
             let copy1 = try! Program(from: proto1)
@@ -75,7 +75,7 @@ class ProgramSerializationTests: XCTestCase {
 
         var proto = program.asProtobuf(opCache: encodingCache)
         let data = try! proto.serializedData()
-        proto = try! Fuzzilli_Protobuf_Program(serializedData: data)
+        proto = try! Fuzzilli_Protobuf_Program(serializedBytes: data)
         let copy = try! Program(from: proto, opCache: decodingCache)
 
         XCTAssertEqual(program, copy)