diff --git a/API/Controllers/ProjectController.cs b/API/Controllers/ProjectController.cs
index 14109b42..01615613 100644
--- a/API/Controllers/ProjectController.cs
+++ b/API/Controllers/ProjectController.cs
@@ -390,6 +390,17 @@ await callToActionOptionService.GetCallToActionOptionFromValueAsync(
                 return BadRequest(problem);
             }
 
+            if(projectResource.ImageIds.Count() > 10)
+            {
+                ProblemDetails problem = new ProblemDetails
+                {
+                    Title = "Too many images.",
+                    Detail = "A project can not have more than 10 images.",
+                    Instance = "9E3E4F91-A6ED-415F-8726-6D33BA0F200F"
+                };
+                return BadRequest(problem);
+            }
+
             foreach(int projectResourceImageId in projectResource.ImageIds)
             {
                 Models.File image = await fileService.FindAsync(projectResourceImageId);
@@ -574,6 +585,17 @@ await callToActionOptionService.GetCallToActionOptionFromValueAsync(
                 project.ProjectIcon = null;
             }
 
+            if(projectResource.ImageIds.Count() > 10)
+            {
+                ProblemDetails problem = new ProblemDetails
+                {
+                    Title = "Too many images.",
+                    Detail = "A project can not have more than 10 images.",
+                    Instance = "5D179737-046E-482B-B6D8-DDDCEF518107"
+                };
+                return BadRequest(problem);
+            }
+
             project.Images.Clear();
             foreach(int projectResourceImageId in projectResource.ImageIds)
             {
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 96a0b8bb..da32d191 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Include categories in retrieving a user's project - [#468](https://github.com/DigitalExcellence/dex-backend/issues/468)
 - Lowercase file extensions on upload - [#472](https://github.com/DigitalExcellence/dex-backend/issues/472)
 - Fixed an issue where Swagger could not authorize with IdentityServer - [#429](https://github.com/DigitalExcellence/dex-backend/issues/429)
+- Projects now has a maximum of 10 images - [#475](https://github.com/DigitalExcellence/dex-backend/issues/475)
 
 ### Security