diff --git a/.travis.yml b/.travis.yml
index b1f35e3..92244a2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: objective-c
 os: osx
-osx_image: xcode12.0
+osx_image: xcode12
 notifications:
     email: false
 
@@ -10,8 +10,8 @@ env:
     - LANG=en_US.UTF-8
     - WORKSPACE=XlsxReaderWriter.xcworkspace
     - IOS_SCHEME="XlsxReaderWriter"
-    - IOS_SDK=iphonesimulator14.1
-    - IOS_DEST="OS=14.1,name=iPhone 12"
+    - IOS_SDK=iphonesimulator14.0
+    - IOS_DEST="OS=14.0,name=iPhone 11"
 
     matrix:
     - DESTINATION="$IOS_DEST" SCHEME="$IOS_SCHEME" SDK="$IOS_SDK" RUN_TESTS="YES"
@@ -20,10 +20,15 @@ cache:
   directories:
     - $HOME/.cocoapods/
 
+before_install:
+    - gem install cocoapods-acknowledgements
+    - gem install cocoapods
+    - pod setup
+    - pod repo update
+
 script:
     - set -o pipefail
     - xcodebuild -version
     - xcodebuild -showsdks
-    - source bundle.sh
-    - lbundle exex pod install
+    - pod install
     - xcodebuild -workspace "$WORKSPACE" -scheme "$SCHEME" -sdk "$SDK" -destination "$DESTINATION" -configuration Debug ONLY_ACTIVE_ARCH=NO ENABLE_TESTABILITY=YES test -enableCodeCoverage YES | xcpretty -c
diff --git a/Podfile b/Podfile
index f3588f5..1013f56 100644
--- a/Podfile
+++ b/Podfile
@@ -1,6 +1,3 @@
-source 'https://github.com/CocoaPods/Specs'
-
-
 def thridparty
     pod 'SSZipArchive', '~> 2.2'
 end
diff --git a/XlsxReaderWriter.xcodeproj/project.pbxproj b/XlsxReaderWriter.xcodeproj/project.pbxproj
index 1e6d9a7..af0e48d 100644
--- a/XlsxReaderWriter.xcodeproj/project.pbxproj
+++ b/XlsxReaderWriter.xcodeproj/project.pbxproj
@@ -1881,7 +1881,10 @@
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
-				OTHER_LDFLAGS = "$(inherited)";
+				OTHER_LDFLAGS = (
+					"$(inherited)",
+					"-ObjC",
+				);
 				SDKROOT = iphoneos;
 			};
 			name = Debug;