diff --git a/CHDataManagement/Model/Content.swift b/CHDataManagement/Model/Content.swift
index 4f769c7..53a7a75 100644
--- a/CHDataManagement/Model/Content.swift
+++ b/CHDataManagement/Model/Content.swift
@@ -214,11 +214,17 @@ final class Content: ObservableObject {
 
     private var imageDimensions: [String: CGSize] = [:]
 
+    private let imageDimensionsQueue = DispatchQueue(label: "imageDimensionsQueue")
+
     func dimensions(of image: String) -> CGSize? {
-        imageDimensions[image]
+        imageDimensionsQueue.sync {
+            imageDimensions[image]
+        }
     }
 
     func cache(dimensions: CGSize?, of image: String) {
-        imageDimensions[image] = dimensions
+        imageDimensionsQueue.sync {
+            imageDimensions[image] = dimensions
+        }
     }
 }