diff --git a/AxolotlKit.podspec b/AxolotlKit.podspec
index 11c016e..ffaf16e 100644
--- a/AxolotlKit.podspec
+++ b/AxolotlKit.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "AxolotlKit"
-  s.version      = "0.5"
+  s.version      = "0.6"
   s.summary      = "AxolotlKit is a Free implementation of the Axolotl protocol in Objective-C"
   s.homepage     = "https://github.com/WhisperSystems/AxolotlKit"
   s.license      = "GPLv2"
@@ -15,5 +15,5 @@ Pod::Spec.new do |s|
   s.requires_arc = true
   s.dependency   '25519',   '~> 1.8'
   s.dependency   'HKDFKit', '~> 0.0.3'
-  s.dependency   'ProtocolBuffers', '~> 1.9.2'
+  s.dependency   'ProtocolBuffers', '~> 1.9.7'
 end
diff --git a/Podfile b/Podfile
index fa43cd9..5f80428 100644
--- a/Podfile
+++ b/Podfile
@@ -4,4 +4,4 @@ link_with ["AxolotlKit", "AxolotlKitTests"]
 
 pod '25519',           '~> 1.8', :inhibit_warnings => true
 pod 'HKDFKit',         '~> 0.0.3'
-pod 'ProtocolBuffers', '~> 1.9.2'
+pod 'ProtocolBuffers', '~> 1.9.7'
diff --git a/Podfile.lock b/Podfile.lock
index 4bd0f1c..4beefe6 100644
--- a/Podfile.lock
+++ b/Podfile.lock
@@ -1,16 +1,16 @@
 PODS:
   - 25519 (1.8)
   - HKDFKit (0.0.3)
-  - ProtocolBuffers (1.9.2)
+  - ProtocolBuffers (1.9.7)
 
 DEPENDENCIES:
   - 25519 (~> 1.8)
   - HKDFKit (~> 0.0.3)
-  - ProtocolBuffers (~> 1.9.2)
+  - ProtocolBuffers (~> 1.9.7)
 
 SPEC CHECKSUMS:
   25519: 601ffb5d258aa33d642062d6fa4096db210e02e7
   HKDFKit: 5998cf1bbb611e7ecc6bd3eaaef8c7a7da7be949
-  ProtocolBuffers: a834d6fe4ae0cc94d081b864e4948bdd483ad228
+  ProtocolBuffers: 37fdd327d36856f965ea9029b5ec0c7120e3a452
 
-COCOAPODS: 0.34.4
+COCOAPODS: 0.35.0