diff --git a/binding/ios/KoalaAppTest/KoalaAppTestUITests/KoalaAppTestUITests.swift b/binding/ios/KoalaAppTest/KoalaAppTestUITests/KoalaAppTestUITests.swift
index 202f165..3991fe7 100644
--- a/binding/ios/KoalaAppTest/KoalaAppTestUITests/KoalaAppTestUITests.swift
+++ b/binding/ios/KoalaAppTest/KoalaAppTestUITests/KoalaAppTestUITests.swift
@@ -155,4 +155,19 @@ class KoalaDemoUITests: XCTestCase {
             XCTAssert("\(error.localizedDescription)".count == first_error.count)
         }
     }
+
+    func testProcessMessageStack() throws {
+        let k = try Koala.init(accessKey: accessKey)
+        k.delete()
+
+        var testPcm: [Int16] = []
+        testPcm.reserveCapacity(Int(Koala.frameLength))
+
+        do {
+            let res = try k.process(testPcm)
+            XCTAssert(res.count == 0)
+        } catch {
+            XCTAssert("\(error.localizedDescription)".count > 0)
+        }
+    }
 }
diff --git a/binding/ios/KoalaAppTest/Podfile b/binding/ios/KoalaAppTest/Podfile
index b8b8929..a8b76e5 100644
--- a/binding/ios/KoalaAppTest/Podfile
+++ b/binding/ios/KoalaAppTest/Podfile
@@ -2,13 +2,13 @@ source 'https://cdn.cocoapods.org/'
 platform :ios, '11.0'
 
 target 'KoalaAppTest' do
-  pod 'Koala-iOS', :podspec => 'https://raw.githubusercontent.com/Picovoice/koala/v2.0-ios/binding/ios/Koala-iOS.podspec'
+  pod 'Koala-iOS', :podspec => 'https://raw.githubusercontent.com/Picovoice/koala/v2.0/binding/ios/Koala-iOS.podspec'
 end
 
 target 'KoalaAppTestUITests' do
-  pod 'Koala-iOS', :podspec => 'https://raw.githubusercontent.com/Picovoice/koala/v2.0-ios/binding/ios/Koala-iOS.podspec'
+  pod 'Koala-iOS', :podspec => 'https://raw.githubusercontent.com/Picovoice/koala/v2.0/binding/ios/Koala-iOS.podspec'
 end
 
 target 'PerformanceTest' do
-  pod 'Koala-iOS', :podspec => 'https://raw.githubusercontent.com/Picovoice/koala/v2.0-ios/binding/ios/Koala-iOS.podspec'
+  pod 'Koala-iOS', :podspec => 'https://raw.githubusercontent.com/Picovoice/koala/v2.0/binding/ios/Koala-iOS.podspec'
 end
diff --git a/binding/ios/KoalaAppTest/Podfile.lock b/binding/ios/KoalaAppTest/Podfile.lock
index debc9fb..382425f 100644
--- a/binding/ios/KoalaAppTest/Podfile.lock
+++ b/binding/ios/KoalaAppTest/Podfile.lock
@@ -2,11 +2,11 @@ PODS:
   - Koala-iOS (2.0.0)
 
 DEPENDENCIES:
-  - Koala-iOS (from `https://raw.githubusercontent.com/Picovoice/koala/v2.0-ios/binding/ios/Koala-iOS.podspec`)
+  - Koala-iOS (from `https://raw.githubusercontent.com/Picovoice/koala/v2.0/binding/ios/Koala-iOS.podspec`)
 
 EXTERNAL SOURCES:
   Koala-iOS:
-    :podspec: https://raw.githubusercontent.com/Picovoice/koala/v2.0-ios/binding/ios/Koala-iOS.podspec
+    :podspec: https://raw.githubusercontent.com/Picovoice/koala/v2.0/binding/ios/Koala-iOS.podspec
 
 CHECKOUT OPTIONS:
   Koala-iOS:
@@ -14,8 +14,8 @@ CHECKOUT OPTIONS:
     :git: https://github.com/Picovoice/koala.git
 
 SPEC CHECKSUMS:
-  Koala-iOS: 865994d8e18b03854f2b933ec9645915ba95f189
+  Koala-iOS: c5190ec400b672d5a363593e224732bdb7cd3afb
 
-PODFILE CHECKSUM: aa02120478c1d3dd9e8085db3379479143edbc02
+PODFILE CHECKSUM: 41b47c56686d6916c5128d756c487b9b3f25767c
 
 COCOAPODS: 1.11.3
diff --git a/binding/python/test_koala.py b/binding/python/test_koala.py
index b27b082..2c2224d 100644
--- a/binding/python/test_koala.py
+++ b/binding/python/test_koala.py
@@ -137,6 +137,28 @@ def test_message_stack(self):
             self.assertEqual(len(error), len(e.message_stack))
             self.assertListEqual(list(error), list(e.message_stack))
 
+    def test_process_message_stack(self):
+        relative_path = '../..'
+
+        k = Koala(
+            access_key=self.access_key,
+            model_path=default_model_path(relative_path),
+            library_path=default_library_path(relative_path))
+
+        test_pcm = [0] * k.frame_length
+
+        address = k._handle
+        k._handle = None
+
+        try:
+            res = k.process(test_pcm)
+            self.assertEqual(len(res), 0)
+        except KoalaError as e:
+            self.assertGreater(len(e.message_stack), 0)
+            self.assertLess(len(e.message_stack), 8)
+
+        k._handle = address
+
 
 if __name__ == '__main__':
     parser = argparse.ArgumentParser()
diff --git a/demo/ios/KoalaDemo/Podfile b/demo/ios/KoalaDemo/Podfile
index a57fb46..705cea4 100644
--- a/demo/ios/KoalaDemo/Podfile
+++ b/demo/ios/KoalaDemo/Podfile
@@ -2,6 +2,6 @@ source 'https://cdn.cocoapods.org/'
 platform :ios, '11.0'
 
 target 'KoalaDemo' do
-  pod 'Koala-iOS', :podspec => 'https://raw.githubusercontent.com/Picovoice/koala/v2.0-ios/binding/ios/Koala-iOS.podspec'
+  pod 'Koala-iOS', :podspec => 'https://raw.githubusercontent.com/Picovoice/koala/v2.0/binding/ios/Koala-iOS.podspec'
   pod 'ios-voice-processor', '~> 1.1.0'
 end
diff --git a/demo/ios/KoalaDemo/Podfile.lock b/demo/ios/KoalaDemo/Podfile.lock
index d168322..bcec58a 100644
--- a/demo/ios/KoalaDemo/Podfile.lock
+++ b/demo/ios/KoalaDemo/Podfile.lock
@@ -4,7 +4,7 @@ PODS:
 
 DEPENDENCIES:
   - ios-voice-processor (~> 1.1.0)
-  - Koala-iOS (from `https://raw.githubusercontent.com/Picovoice/koala/v2.0-ios/binding/ios/Koala-iOS.podspec`)
+  - Koala-iOS (from `https://raw.githubusercontent.com/Picovoice/koala/v2.0/binding/ios/Koala-iOS.podspec`)
 
 SPEC REPOS:
   trunk:
@@ -12,7 +12,7 @@ SPEC REPOS:
 
 EXTERNAL SOURCES:
   Koala-iOS:
-    :podspec: https://raw.githubusercontent.com/Picovoice/koala/v2.0-ios/binding/ios/Koala-iOS.podspec
+    :podspec: https://raw.githubusercontent.com/Picovoice/koala/v2.0/binding/ios/Koala-iOS.podspec
 
 CHECKOUT OPTIONS:
   Koala-iOS:
@@ -21,8 +21,8 @@ CHECKOUT OPTIONS:
 
 SPEC CHECKSUMS:
   ios-voice-processor: 8e32d7f980a06d392d128ef1cd19cf6ddcaca3c1
-  Koala-iOS: 865994d8e18b03854f2b933ec9645915ba95f189
+  Koala-iOS: c5190ec400b672d5a363593e224732bdb7cd3afb
 
-PODFILE CHECKSUM: 0f89a64b9647d42bf16b4915aa88de8d933489b8
+PODFILE CHECKSUM: 65beadb4e5a0c4d4e33a9c747318d401315106c2
 
 COCOAPODS: 1.11.3