diff --git a/AsyncSwift.xcodeproj/project.pbxproj b/AsyncSwift.xcodeproj/project.pbxproj
index bfd8376..62cb9ff 100644
--- a/AsyncSwift.xcodeproj/project.pbxproj
+++ b/AsyncSwift.xcodeproj/project.pbxproj
@@ -56,6 +56,8 @@
 		E94F92C728D2505100D9E759 /* Ticketing.swift in Sources */ = {isa = PBXBuildFile; fileRef = E94F92C628D2505100D9E759 /* Ticketing.swift */; };
 		E9E2A4D828CEC5680016AEFF /* WebView.swift in Sources */ = {isa = PBXBuildFile; fileRef = E9E2A4D728CEC5680016AEFF /* WebView.swift */; };
 		FBCCC4F32ACAB5BD00FFF26B /* SDWebImageSwiftUI in Frameworks */ = {isa = PBXBuildFile; productRef = FBCCC4F22ACAB5BD00FFF26B /* SDWebImageSwiftUI */; };
+		FBDEF9A32AD2A66600FF7028 /* GitHubStorageURL.swift in Sources */ = {isa = PBXBuildFile; fileRef = FBDEF9A22AD2A66600FF7028 /* GitHubStorageURL.swift */; };
+		FBDEF9A42AD2A66600FF7028 /* GitHubStorageURL.swift in Sources */ = {isa = PBXBuildFile; fileRef = FBDEF9A22AD2A66600FF7028 /* GitHubStorageURL.swift */; };
 		FBF437072AC9562B00B22B05 /* WidgetKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = FBF437062AC9562B00B22B05 /* WidgetKit.framework */; };
 		FBF437092AC9562B00B22B05 /* SwiftUI.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = FBF437082AC9562B00B22B05 /* SwiftUI.framework */; };
 		FBF4370C2AC9562B00B22B05 /* AsyncSwiftWidgetBundle.swift in Sources */ = {isa = PBXBuildFile; fileRef = FBF4370B2AC9562B00B22B05 /* AsyncSwiftWidgetBundle.swift */; };
@@ -138,6 +140,7 @@
 		E9171EFF28D15426002FAF52 /* TicketingView+Observed.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "TicketingView+Observed.swift"; sourceTree = "<group>"; };
 		E94F92C628D2505100D9E759 /* Ticketing.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Ticketing.swift; sourceTree = "<group>"; };
 		E9E2A4D728CEC5680016AEFF /* WebView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = WebView.swift; sourceTree = "<group>"; };
+		FBDEF9A22AD2A66600FF7028 /* GitHubStorageURL.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GitHubStorageURL.swift; sourceTree = "<group>"; };
 		FBF437052AC9562B00B22B05 /* AsyncSwiftWidgetExtension.appex */ = {isa = PBXFileReference; explicitFileType = "wrapper.app-extension"; includeInIndex = 0; path = AsyncSwiftWidgetExtension.appex; sourceTree = BUILT_PRODUCTS_DIR; };
 		FBF437062AC9562B00B22B05 /* WidgetKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = WidgetKit.framework; path = System/Library/Frameworks/WidgetKit.framework; sourceTree = SDKROOT; };
 		FBF437082AC9562B00B22B05 /* SwiftUI.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = SwiftUI.framework; path = System/Library/Frameworks/SwiftUI.framework; sourceTree = SDKROOT; };
@@ -255,6 +258,7 @@
 			children = (
 				C63D444B291BDCDC005D5AE6 /* KeyChainManager.swift */,
 				C69C13BE2913EC9400D9B47F /* FirebaseManager.swift */,
+				FBDEF9A22AD2A66600FF7028 /* GitHubStorageURL.swift */,
 			);
 			path = Managers;
 			sourceTree = "<group>";
@@ -457,6 +461,7 @@
 				C6AA71E828FC65680091A868 /* Text+.swift in Sources */,
 				C68DE94C28C76F3200CA4CC8 /* AppDelegate.swift in Sources */,
 				E94F92C728D2505100D9E759 /* Ticketing.swift in Sources */,
+				FBDEF9A32AD2A66600FF7028 /* GitHubStorageURL.swift in Sources */,
 				C69C13C1291418A000D9B47F /* ProfileEditView.swift in Sources */,
 				C63D4450291BDD2B005D5AE6 /* String+.swift in Sources */,
 				C63D444C291BDCDC005D5AE6 /* KeyChainManager.swift in Sources */,
@@ -504,6 +509,7 @@
 				FBF4370E2AC9562B00B22B05 /* AsyncSwiftWidget.swift in Sources */,
 				FBF4370C2AC9562B00B22B05 /* AsyncSwiftWidgetBundle.swift in Sources */,
 				FBF4371B2AC9588800B22B05 /* AsyncSwiftWidgetEntryView.swift in Sources */,
+				FBDEF9A42AD2A66600FF7028 /* GitHubStorageURL.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
diff --git a/AsyncSwift/Managers/GitHubStorageURL.swift b/AsyncSwift/Managers/GitHubStorageURL.swift
new file mode 100644
index 0000000..034c35c
--- /dev/null
+++ b/AsyncSwift/Managers/GitHubStorageURL.swift
@@ -0,0 +1,21 @@
+//
+//  GitHubStorageURL.swift
+//  AsyncSwift
+//
+//  Created by 김인섭 on 10/8/23.
+//
+
+import Foundation
+
+enum GitHubStorageURL {
+    
+    static let baseUrl = "https://async-swift.github.io/jsonstorage"
+    static let customDomain = "https://asyncswift.info/"
+    
+    static let widgetLargeImage = customDomain + "/Images/widget-large.svg"
+    static let eventData = GitHubStorageURL.baseUrl + "/asyncswift.json"
+    static var stampImage: (String) -> String {{ event in
+        GitHubStorageURL.baseUrl + "/Images/Stamp/" + event + "/stamp.png"
+    }}
+    static let ticketingData = GitHubStorageURL.baseUrl + "/ticketing.json"
+}
diff --git a/AsyncSwift/Observed/EventView+Observed.swift b/AsyncSwift/Observed/EventView+Observed.swift
index 9e0a2ae..9e4b0c5 100644
--- a/AsyncSwift/Observed/EventView+Observed.swift
+++ b/AsyncSwift/Observed/EventView+Observed.swift
@@ -17,8 +17,7 @@ final class EventViewObserved: ObservableObject {
     var cancellable = Set<AnyCancellable>()
     
     func getEventData() {
-        let urlString = "https://async-swift.github.io/jsonstorage/asyncswift.json"
-        let url = URL(string: urlString)!
+        let url = URL(string: GitHubStorageURL.eventData)!
         URLSession.shared.dataTaskPublisher(for: url)
             .map(\.data)
             .decode(type: Event.self, decoder: JSONDecoder())
diff --git a/AsyncSwift/Observed/StampView+Observed.swift b/AsyncSwift/Observed/StampView+Observed.swift
index d35bec6..2bbba80 100644
--- a/AsyncSwift/Observed/StampView+Observed.swift
+++ b/AsyncSwift/Observed/StampView+Observed.swift
@@ -41,9 +41,7 @@ extension StampView {
                 guard let self else { return }
                 let event = $0.element
                 let index = $0.offset
-
-                let urlString = "https://raw.githubusercontent.com/Async-Swift/jsonstorage/main/Images/Stamp/" + event + "/stamp.png"
-                let url = URL(string: urlString)!
+                let url = URL(string: GitHubStorageURL.stampImage(event))!
                 
                 URLSession.shared.dataTaskPublisher(for: url)
                     .map(\.data)
diff --git a/AsyncSwift/Observed/TicketingView+Observed.swift b/AsyncSwift/Observed/TicketingView+Observed.swift
index 4de6fc8..809edcb 100644
--- a/AsyncSwift/Observed/TicketingView+Observed.swift
+++ b/AsyncSwift/Observed/TicketingView+Observed.swift
@@ -24,8 +24,7 @@ extension TicketingView {
         }
         
         func getTicketingData() {
-            let urlString = "https://raw.githubusercontent.com/Async-Swift/jsonstorage/main/ticketing.json"
-            let url = URL(string: urlString)!
+            let url = URL(string: GitHubStorageURL.ticketingData)!
             URLSession.shared.dataTaskPublisher(for: url)
                 .map(\.data)
                 .decode(type: Ticketing.self, decoder: JSONDecoder())
diff --git a/AsyncSwiftWidget/AsyncSwiftWidget.swift b/AsyncSwiftWidget/AsyncSwiftWidget.swift
index f164114..4421c1e 100644
--- a/AsyncSwiftWidget/AsyncSwiftWidget.swift
+++ b/AsyncSwiftWidget/AsyncSwiftWidget.swift
@@ -27,8 +27,7 @@ struct Provider: TimelineProvider {
     }
     
     func getRemoteImage() -> Data? {
-        let urlString = "https://raw.githubusercontent.com/Async-Swift/jsonstorage/a94eb982e9b9db90543de1d574a6dc5f0c637f5b/Images/widget-large.svg"
-        return try? Data(contentsOf: URL(string: urlString)!)
+        try? Data(contentsOf: URL(string: GitHubStorageURL.widgetLargeImage)!)
     }
 }
 
@@ -54,7 +53,12 @@ struct AsyncSwiftWidget: Widget {
 
 struct AsyncSwiftWidget_Previews: PreviewProvider {
     static var previews: some View {
-        AsyncSwiftWidgetEntryView(entry: SimpleEntry(date: Date(), imageData: nil))
-            .previewContext(WidgetPreviewContext(family: .systemSmall))
+        AsyncSwiftWidgetEntryView(
+            entry: SimpleEntry(
+                date: Date(),
+                imageData: try? Data(contentsOf: URL(string: GitHubStorageURL.widgetLargeImage)!)
+            )
+        )
+        .previewContext(WidgetPreviewContext(family: .systemSmall))
     }
 }