diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a696376..cba3e64 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,3 +35,25 @@ jobs:
         action: xcodebuild-test
         platform: ${{ matrix.platform }}
         scheme: swift-declarative-configuration-Package
+
+  xcodebuild-swift5:
+    name: xcodebuild-swift5
+    if: |
+      !contains(github.event.head_commit.message, '[ci skip]') &&
+      !contains(github.event.head_commit.message, '[ci skip test]')
+    runs-on: macos-14
+    strategy:
+      matrix:
+        platform: [iOS, macOS, macCatalyst, tvOS, watchOS]
+        xcode: ['15.4']
+    timeout-minutes: 30
+    steps:
+    - uses: actions/checkout@v6
+    - name: Test
+      uses: capturecontext/swift-package-action/build@3.0-beta.13
+      with:
+        xcode: ${{ matrix.xcode }}
+        cache-derived-data: true
+        action: xcodebuild
+        platform: ${{ matrix.platform }}
+        scheme: swift-declarative-configuration-Package
diff --git a/Sources/Deprecated/FunctionalClosures/Deprecated.swift b/Sources/Deprecated/FunctionalClosures/Deprecated.swift
index ba08f8e..eac3945 100644
--- a/Sources/Deprecated/FunctionalClosures/Deprecated.swift
+++ b/Sources/Deprecated/FunctionalClosures/Deprecated.swift
@@ -6,6 +6,7 @@ public enum HandlerContainerBehaviour {
 	case appending
 }
 
+#if swift(>=5.10)
 /// A wrapper for clusure-based interaction between objects
 ///
 /// Provides a public API to set internal closure-based hanlder or delegate with a functional API
@@ -48,6 +49,7 @@ public class _Handler<each T> {
 		projectedValue?(repeat each input)
 	}
 }
+#endif
 
 @available(*, deprecated, message: "If you use this functionality, consider copying sources and please submit an issue to the repo, our advice is to use Combine/Observation instead")
 public typealias Handler = Handler1
@@ -432,6 +434,7 @@ func unpack<each Args, T>(
 
 // MARK: - DataSource
 
+#if swift(>=5.10)
 /// A wrapper for clusure-based interaction between objects
 ///
 /// Provides a public API to set internal closure-based datasource with a functional API
@@ -470,6 +473,7 @@ public class _DataSource<each T, Output> {
 		projectedValue(repeat each args)
 	}
 }
+#endif
 
 /// A wrapper for clusure-based interaction between objects
 ///