diff --git a/Amplitude.podspec b/Amplitude.podspec
index a28cc9f3..f4af9c4f 100644
--- a/Amplitude.podspec
+++ b/Amplitude.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name                   = "Amplitude"
-  s.version                = "5.2.0"
+  s.version                = "5.2.1"
   s.summary                = "Amplitude iOS/tvOS/macOS SDK."
   s.homepage               = "https://amplitude.com"
   s.license                = { :type => "MIT" }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e1b6c12..54209e29 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 5.2.1 (Jul 6, 2020)
+
+* Removed obsolete certificates used for SSL Pinning before.
+
 ## 5.2.0 (Jun 2, 2020)
 
 * Fixed an implementation issue in SSL pinning. If you're using SSL pinning, please update your SDK ASAP.
diff --git a/Sources/Amplitude/AMPConstants.m b/Sources/Amplitude/AMPConstants.m
index 5246c62c..1a0fd0f5 100644
--- a/Sources/Amplitude/AMPConstants.m
+++ b/Sources/Amplitude/AMPConstants.m
@@ -24,7 +24,7 @@
 #import "AMPConstants.h"
 
 NSString *const kAMPLibrary = @"amplitude-ios";
-NSString *const kAMPVersion = @"5.2.0";
+NSString *const kAMPVersion = @"5.2.1";
 NSString *const kAMPUnknownLibrary = @"unknown-library";
 NSString *const kAMPUnknownVersion = @"unknown-version";
 NSString *const kAMPEventLogDomain = @"api.amplitude.com";