Set Protobuf-C++ version to exactly 3.13 so Protobuf runtime matches pre-generated proto C++ files. Update README to include working Podfile example.
diff --git a/GTXiLib.podspec b/GTXiLib.podspec
index 1442d7e..f570513 100644
--- a/GTXiLib.podspec
+++ b/GTXiLib.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "GTXiLib"
-  s.version      = "4.5"
+  s.version      = "4.6"
   s.summary      = "iOS Accessibility testing library."
   s.description  = <<-DESC
   iOS Accessibility testing library that works with XCTest based frameworks.
@@ -9,7 +9,7 @@
   s.license      = "Apache License 2.0"
   s.author       = "j-sid"
   s.platform     = :ios
-  s.source       = { :git => "https://github.com/google/GTXiLib.git", :tag => "4.5.0" }
+  s.source       = { :git => "https://github.com/google/GTXiLib.git", :tag => "4.6.0" }
   s.source_files = "{Classes,OOPClasses}/**/*.{h,m,swift,mm,cc}"
   s.public_header_files = "Classes/**/*.h"
   s.private_header_files = [
@@ -21,5 +21,5 @@
   ]
   s.ios.deployment_target = '9.0'
   s.libraries = 'c++'
-  s.dependency 'Protobuf-C++'
+  s.dependency 'Protobuf-C++', '3.13'
 end
diff --git a/README.md b/README.md
index 813f1dd..128d490 100644
--- a/README.md
+++ b/README.md
@@ -77,6 +77,23 @@
 using the xcodeproj file you must also link to the [C++ protobuf library](https://github.com/protocolbuffers/protobuf/tree/master/src) and reference
 headers under "GTXiLib > Build Settings > Header Search Paths".
 
+## Podfile
+If installing via CocoaPods, you need to add `GTXiLib` as a dependency in your Podfile. `GTXiLib` only runs in test processes, so do not add it to your main app's spec. Additionally, CocoaPods no longer requires `use_frameworks!`. `use_frameworks!` will cause your build to fail with error `ld: framework not found`. Your Podfile should look like:
+```
+target 'myapp' do
+  # Configuration for app myapp
+
+  # Note the lack of use_frameworks!
+
+  target 'myappTests' do
+    inherit! :search_paths
+    # Pods for testing
+    pod 'GTXiLib'
+  end
+
+end
+```
+
 ## CocoaPods and Swift
 GTXiLib supports Swift projects. The installation instructions are almost the same as for Objective-C projects. Your `Podfile` should look like
 ```