diff --git a/SPTPersistentCache.xcodeproj/project.pbxproj b/SPTPersistentCache.xcodeproj/project.pbxproj
index 1be4897..9fc16c0 100644
--- a/SPTPersistentCache.xcodeproj/project.pbxproj
+++ b/SPTPersistentCache.xcodeproj/project.pbxproj
@@ -16,6 +16,7 @@
 		0595F0A91C5008060052328B /* SPTPersistentCacheRecord.m in Sources */ = {isa = PBXBuildFile; fileRef = 0595F0A81C5008060052328B /* SPTPersistentCacheRecord.m */; };
 		0595F0B01C5009800052328B /* SPTPersistentCacheResponse.m in Sources */ = {isa = PBXBuildFile; fileRef = 0595F0AF1C5009800052328B /* SPTPersistentCacheResponse.m */; };
 		0595F33A1C50117B0052328B /* SPTPersistentCacheGarbageCollector.m in Sources */ = {isa = PBXBuildFile; fileRef = 0595F3391C50117B0052328B /* SPTPersistentCacheGarbageCollector.m */; };
+		357E7B8821FA10F8003CD761 /* SPTPersistentCacheRecordMutableTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 357E7B8721FA10F7003CD761 /* SPTPersistentCacheRecordMutableTests.m */; };
 		696CD78A1C4707E20071DD18 /* crc32iso3309.c in Sources */ = {isa = PBXBuildFile; fileRef = 696CD7841C4707E20071DD18 /* crc32iso3309.c */; };
 		696CD78B1C4707E20071DD18 /* SPTPersistentCache.m in Sources */ = {isa = PBXBuildFile; fileRef = 696CD7861C4707E20071DD18 /* SPTPersistentCache.m */; };
 		696CD78C1C4707E20071DD18 /* SPTPersistentCacheOptions.m in Sources */ = {isa = PBXBuildFile; fileRef = 696CD7871C4707E20071DD18 /* SPTPersistentCacheOptions.m */; };
@@ -102,6 +103,7 @@
 		0595F3391C50117B0052328B /* SPTPersistentCacheGarbageCollector.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = SPTPersistentCacheGarbageCollector.m; sourceTree = "<group>"; };
 		0595F33B1C5011E30052328B /* SPTPersistentCache+Private.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "SPTPersistentCache+Private.h"; sourceTree = "<group>"; };
 		05C0B6531DDF7F9C00DDC99A /* CHANGELOG.md */ = {isa = PBXFileReference; lastKnownFileType = net.daringfireball.markdown; path = CHANGELOG.md; sourceTree = "<group>"; };
+		357E7B8721FA10F7003CD761 /* SPTPersistentCacheRecordMutableTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = SPTPersistentCacheRecordMutableTests.m; sourceTree = "<group>"; };
 		696CD7841C4707E20071DD18 /* crc32iso3309.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = crc32iso3309.c; sourceTree = "<group>"; };
 		696CD7851C4707E20071DD18 /* crc32iso3309.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = crc32iso3309.h; sourceTree = "<group>"; };
 		696CD7861C4707E20071DD18 /* SPTPersistentCache.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = SPTPersistentCache.m; sourceTree = "<group>"; };
@@ -221,6 +223,7 @@
 				C4B414901C6A24A10099FECD /* SPTPersistentCacheOptionsTests.m */,
 				772B8BF01D6DE879008E7347 /* SPTPersistentCachePerformanceTests.m */,
 				C4B4148B1C6A01970099FECD /* SPTPersistentCacheRecordTests.m */,
+				357E7B8721FA10F7003CD761 /* SPTPersistentCacheRecordMutableTests.m */,
 				C4B4148E1C6A1BED0099FECD /* SPTPersistentCacheResponseTests.m */,
 				0510FF6A1BA3073D00ED0766 /* SPTPersistentCacheTests.m */,
 			);
@@ -473,6 +476,7 @@
 				772B8BF11D6DE879008E7347 /* SPTPersistentCachePerformanceTests.m in Sources */,
 				C4B4148F1C6A1BED0099FECD /* SPTPersistentCacheResponseTests.m in Sources */,
 				C48AE7411C75BB8300814D7D /* SPTPersistentCacheFileManagerTests.m in Sources */,
+				357E7B8821FA10F8003CD761 /* SPTPersistentCacheRecordMutableTests.m in Sources */,
 				9C9E70731C78D5AA00E1CBE6 /* SPTPersistentCacheObjectDescriptionTests.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
diff --git a/Sources/SPTPersistentCacheRecord.m b/Sources/SPTPersistentCacheRecord.m
index 2ee8fd1..b538cdf 100644
--- a/Sources/SPTPersistentCacheRecord.m
+++ b/Sources/SPTPersistentCacheRecord.m
@@ -35,7 +35,7 @@ - (instancetype)initWithData:(NSData *)data
         _refCount = refCount;
         _ttl = ttl;
         _key = [key copy];
-        _data = data;
+        _data = [data copy];
     }
     return self;
 }
diff --git a/Tests/SPTPersistentCacheRecordMutableTests.m b/Tests/SPTPersistentCacheRecordMutableTests.m
new file mode 100644
index 0000000..f3848a3
--- /dev/null
+++ b/Tests/SPTPersistentCacheRecordMutableTests.m
@@ -0,0 +1,53 @@
+/*
+ Copyright (c) 2019 Spotify AB.
+
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements.  See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership.  The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License.  You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied.  See the License for the
+ specific language governing permissions and limitations
+ under the License.
+ */
+
+#import <XCTest/XCTest.h>
+#import "SPTPersistentCacheRecord.h"
+#import "SPTPersistentCacheRecord+Private.h"
+#import <string.h>
+
+static const NSUInteger SPTPersistentCacheRecordTestSamplesCount = 10;
+static const NSUInteger SPTPersistentCacheRecordTestRefCount = 43244555;
+static const NSUInteger SPTPersistentCacheRecordTestTTL = 43244555;
+
+@interface SPTPersistentCacheRecordMutableTests : XCTestCase
+@end
+
+@implementation SPTPersistentCacheRecordMutableTests
+
+- (void)testSPTPersistentCacheRecordWithMutableData {
+    NSMutableArray<NSData *> *dataSamples = [NSMutableArray arrayWithCapacity: SPTPersistentCacheRecordTestSamplesCount];
+    NSMutableArray<SPTPersistentCacheRecord *> *cacheRecords = [NSMutableArray arrayWithCapacity: SPTPersistentCacheRecordTestSamplesCount];
+
+    NSMutableData *d = [NSMutableData dataWithLength:sizeof(NSUInteger)];
+    for (NSUInteger i = 0; i < SPTPersistentCacheRecordTestSamplesCount; i++) {
+        memcpy(d.mutableBytes, &i, sizeof(i));
+        [dataSamples addObject: [d copy]];
+        SPTPersistentCacheRecord *record = [[SPTPersistentCacheRecord alloc] initWithData: d key: [NSString stringWithFormat:@"key%lu", i] refCount: SPTPersistentCacheRecordTestRefCount ttl:SPTPersistentCacheRecordTestTTL];
+        [cacheRecords addObject: record];
+    }
+
+    for (NSUInteger i = 0; i < SPTPersistentCacheRecordTestSamplesCount; i++) {
+        XCTAssertEqualObjects(cacheRecords[i].data, dataSamples[i]);
+    }
+}
+
+@end
diff --git a/include/SPTPersistentCache/SPTPersistentCacheRecord.h b/include/SPTPersistentCache/SPTPersistentCacheRecord.h
index a078d49..908a8cd 100644
--- a/include/SPTPersistentCache/SPTPersistentCacheRecord.h
+++ b/include/SPTPersistentCache/SPTPersistentCacheRecord.h
@@ -47,7 +47,7 @@ NS_ASSUME_NONNULL_BEGIN
 /*
  Data that was initially passed into storeData:...
  */
-@property (nonatomic, strong, readonly) NSData *data;
+@property (nonatomic, copy, readonly) NSData *data;
 
 @end