diff --git a/Changelog.md b/Changelog.md
index b8ec83c..f4179cc 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -4,6 +4,11 @@
 
 - Nothing yet.
 
+## 4.2.0
+
+- Updated RxSwift requirement. 
+- Swift 4.1 support again. See [#30](https://github.com/RxSwiftCommunity/RxNimble/pull/31).
+
 ## 4.1.1
 
 - Swift 4.1 support. See [#30](https://github.com/RxSwiftCommunity/RxNimble/issues/30).
diff --git a/Demo/Demo.xcodeproj/project.pbxproj b/Demo/Demo.xcodeproj/project.pbxproj
index 97b6277..9adbc05 100644
--- a/Demo/Demo.xcodeproj/project.pbxproj
+++ b/Demo/Demo.xcodeproj/project.pbxproj
@@ -139,8 +139,6 @@
 				5E47F3241C3EAE9B00EC0751 /* Sources */,
 				5E47F3251C3EAE9B00EC0751 /* Frameworks */,
 				5E47F3261C3EAE9B00EC0751 /* Resources */,
-				8EC133641E3963166AA7C9C3 /* [CP] Embed Pods Frameworks */,
-				12D863B873789B9CCCD06988 /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -160,7 +158,6 @@
 				5E47F3391C3EAE9B00EC0751 /* Frameworks */,
 				5E47F33A1C3EAE9B00EC0751 /* Resources */,
 				BFBAE9138B5A3CE9DCC8CF11 /* [CP] Embed Pods Frameworks */,
-				9081272DF92D5737A7AFD5CB /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -232,21 +229,6 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		12D863B873789B9CCCD06988 /* [CP] Copy Pods Resources */ = {
-			isa = PBXShellScriptBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			inputPaths = (
-			);
-			name = "[CP] Copy Pods Resources";
-			outputPaths = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-Demo/Pods-Demo-resources.sh\"\n";
-			showEnvVarsInLog = 0;
-		};
 		4684295F66E54B3D255A1C9D /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
@@ -265,36 +247,6 @@
 			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
 			showEnvVarsInLog = 0;
 		};
-		8EC133641E3963166AA7C9C3 /* [CP] Embed Pods Frameworks */ = {
-			isa = PBXShellScriptBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			inputPaths = (
-			);
-			name = "[CP] Embed Pods Frameworks";
-			outputPaths = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-Demo/Pods-Demo-frameworks.sh\"\n";
-			showEnvVarsInLog = 0;
-		};
-		9081272DF92D5737A7AFD5CB /* [CP] Copy Pods Resources */ = {
-			isa = PBXShellScriptBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			inputPaths = (
-			);
-			name = "[CP] Copy Pods Resources";
-			outputPaths = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-DemoTests/Pods-DemoTests-resources.sh\"\n";
-			showEnvVarsInLog = 0;
-		};
 		BFBAE9138B5A3CE9DCC8CF11 /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
diff --git a/Demo/Podfile.lock b/Demo/Podfile.lock
index b8aa507..2895ad8 100644
--- a/Demo/Podfile.lock
+++ b/Demo/Podfile.lock
@@ -1,30 +1,37 @@
 PODS:
-  - Nimble (7.0.2)
-  - Quick (1.2.0)
-  - RxBlocking (4.0.0):
+  - Nimble (7.3.0)
+  - Quick (1.3.1)
+  - RxBlocking (4.2.0):
     - RxSwift (~> 4.0)
-  - RxNimble (4.1.0):
+  - RxNimble (4.2.0):
     - Nimble (~> 7.0)
     - RxBlocking (~> 4.0)
-    - RxSwift (~> 4.0)
-  - RxSwift (4.0.0)
+    - RxSwift (~> 4.2)
+  - RxSwift (4.2.0)
 
 DEPENDENCIES:
   - Nimble
   - Quick
   - RxNimble (from `../`)
 
+SPEC REPOS:
+  https://github.com/cocoapods/specs.git:
+    - Nimble
+    - Quick
+    - RxBlocking
+    - RxSwift
+
 EXTERNAL SOURCES:
   RxNimble:
-    :path: ../
+    :path: "../"
 
 SPEC CHECKSUMS:
-  Nimble: bfe1f814edabba69ff145cb1283e04ed636a67f2
-  Quick: 58d203b1c5e27fff7229c4c1ae445ad7069a7a08
-  RxBlocking: 923c2c8106d80d7c2d6b276afd66ce3b10824836
-  RxNimble: ca8181857989e395eb342c442a567eed6b0f18a5
-  RxSwift: fd680d75283beb5e2559486f3c0ff852f0d35334
+  Nimble: c8d6a1f463701921c46de965c673e13cafa09196
+  Quick: d17304d58d0d169dd0bd1c6e5c28e3318de32a1a
+  RxBlocking: e339d8a6e752e25ade95ff858466c55436668f59
+  RxNimble: cb8c3dd1ca79b83c60744f1c327130c1aef202a1
+  RxSwift: 99e10317ddfcc7fbe01356aafd118fde4a0be104
 
 PODFILE CHECKSUM: 7405369509db0cbd242146add66181ab5ab0efb0
 
-COCOAPODS: 1.3.1
+COCOAPODS: 1.5.3
diff --git a/RxNimble.podspec b/RxNimble.podspec
index 7c4f0b4..31af6f0 100644
--- a/RxNimble.podspec
+++ b/RxNimble.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "RxNimble"
-  s.version      = "4.1.1"
+  s.version      = "4.2.0"
   s.summary      = "Nimble extensions that making unit testing with RxSwift easier 🎉"
   s.description  = <<-DESC
     This library includes functions that make testing RxSwift projects easier with Nimble.
@@ -15,7 +15,7 @@ Pod::Spec.new do |s|
   s.source       = { :git => "https://github.com/RxSwiftCommunity/RxNimble.git", :tag => s.version }
   s.source_files  = "Source/**/*.swift"
   s.dependency "Nimble", "~> 7.0"
-  s.dependency "RxSwift", "~> 4.0"
+  s.dependency "RxSwift", "~> 4.2"
   s.dependency "RxBlocking", "~> 4.0"
   
   s.pod_target_xcconfig = { 'ENABLE_BITCODE' => 'NO', 'FRAMEWORK_SEARCH_PATHS' => '$(inherited) "$(PLATFORM_DIR)/Developer/Library/Frameworks"' }