diff --git a/Sources/PopupUI/PopupAnimation.swift b/Sources/PopupUI/PopupAnimation.swift
index ba644d6..c45714e 100644
--- a/Sources/PopupUI/PopupAnimation.swift
+++ b/Sources/PopupUI/PopupAnimation.swift
@@ -11,7 +11,7 @@ public class PopupAnimation {
     
     public static var `default` = PopupAnimation(.center, .spring(response: 0.4, dampingFraction: 0.7, blendDuration: 0.35))
 
-    public let position: PopupPosition
+    public var position: PopupPosition
 
     public var animation: Animation
     
@@ -25,6 +25,20 @@ public class PopupAnimation {
 
 }
 
+extension PopupAnimation {
+    @discardableResult
+    public func position(_ position: PopupPosition) -> PopupAnimation {
+        self.position = position
+        return self
+    }
+    
+    @discardableResult
+    public func animation(_ animation: Animation) -> PopupAnimation {
+        self.animation = animation
+        return self
+    }
+}
+
 extension Animation {
     var duration: TimeInterval {
         TimeInterval(description.components(separatedBy: ",").first(where: { $0.contains("duration") })?.components(separatedBy: "duration: ").last ??