diff --git a/AmplitudeExperiment.podspec b/AmplitudeExperiment.podspec
index d5ee69e..7973440 100644
--- a/AmplitudeExperiment.podspec
+++ b/AmplitudeExperiment.podspec
@@ -24,7 +24,7 @@ Pod::Spec.new do |spec|
   spec.tvos.source_files      = 'sources/Experiment/**/*.{h,swift}'
   spec.tvos.resource_bundle   = { 'AmplitudeExperiment': ['Sources/Experiment/PrivacyInfo.xcprivacy'] }
   
-  spec.watchos.deployment_target = '3.0'
+  spec.watchos.deployment_target = '4.0'
   spec.watchos.source_files      = 'sources/Experiment/**/*.{h,swift}'
   spec.watchos.resource_bundle   = { 'AmplitudeExperiment': ['Sources/Experiment/PrivacyInfo.xcprivacy'] }
   
diff --git a/Experiment.xcodeproj/project.pbxproj b/Experiment.xcodeproj/project.pbxproj
index 0ace301..a48ab99 100644
--- a/Experiment.xcodeproj/project.pbxproj
+++ b/Experiment.xcodeproj/project.pbxproj
@@ -488,6 +488,7 @@
 				TVOS_DEPLOYMENT_TARGET = 11.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
+				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Debug;
 		};
@@ -549,6 +550,7 @@
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
+				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Release;
 		};
@@ -581,7 +583,7 @@
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2,3,4,6";
 				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 3.0;
+				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Debug;
 		};
@@ -613,7 +615,7 @@
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2,3,4,6";
 				TVOS_DEPLOYMENT_TARGET = 11.0;
-				WATCHOS_DEPLOYMENT_TARGET = 3.0;
+				WATCHOS_DEPLOYMENT_TARGET = 4.0;
 			};
 			name = Release;
 		};
diff --git a/Package.swift b/Package.swift
index 3151e9a..8dcd383 100644
--- a/Package.swift
+++ b/Package.swift
@@ -9,7 +9,7 @@ let package = Package(
         .iOS(.v10),
         .macOS(.v10_13),
         .tvOS(.v11),
-        .watchOS(.v3)
+        .watchOS(.v4)
     ],
     products: [
         // Products define the executables and libraries a package produces, and make them visible to other packages.