diff --git a/Classes/BITCrashReportTextFormatter.m b/Classes/BITCrashReportTextFormatter.m
index d66fc0445b..3d13b519ea 100644
--- a/Classes/BITCrashReportTextFormatter.m
+++ b/Classes/BITCrashReportTextFormatter.m
@@ -584,7 +584,7 @@ static NSInteger binaryImageSort(id binary1, id binary2, void *context) {
     
     /* Make sure UTF8/16 characters are handled correctly */
     NSInteger offset = 0;
-    NSInteger index = 0;
+    NSUInteger index = 0;
     for (index = 0; index < [imageName length]; index++) {
         NSRange range = [imageName rangeOfComposedCharacterSequenceAtIndex:index];
         if (range.length > 1) {
diff --git a/Classes/BITHockeyManager.m b/Classes/BITHockeyManager.m
index edeb584094..68d734d317 100644
--- a/Classes/BITHockeyManager.m
+++ b/Classes/BITHockeyManager.m
@@ -57,7 +57,7 @@
   if (identifier) {
     NSCharacterSet *hexSet = [NSCharacterSet characterSetWithCharactersInString:@"0123456789abcdef"];
     NSCharacterSet *inStringSet = [NSCharacterSet characterSetWithCharactersInString:identifier];
-    result = ([_appIdentifier length] == 32) && ([hexSet isSupersetOfSet:inStringSet]);
+    result = ([identifier length] == 32) && ([hexSet isSupersetOfSet:inStringSet]);
   }
   
   return result;
diff --git a/README.md b/README.md
index 9718fc30e3..582dd193f0 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,12 @@ This documentation provides integrated help in Xcode for all public APIs and a s
 
 ## Changelog
 
+### Version 2.5.3
+
+- General:
+
+    - Fix checking validity of live identifier not working correctly
+
 ### Version 2.5.2
 
 - General:
diff --git a/Support/buildnumber.xcconfig b/Support/buildnumber.xcconfig
index 26565c7557..578f418940 100644
--- a/Support/buildnumber.xcconfig
+++ b/Support/buildnumber.xcconfig
@@ -1,3 +1,3 @@
-BUILD_NUMBER = 4
-VERSION_STRING = 2.5.2
-GCC_PREPROCESSOR_DEFINITIONS = $(inherited) BITHOCKEY_VERSION="@\"2.5.2\""
+BUILD_NUMBER = 5
+VERSION_STRING = 2.5.3
+GCC_PREPROCESSOR_DEFINITIONS = $(inherited) BITHOCKEY_VERSION="@\"2.5.3\""