diff --git a/src/features/projects/data/GitHubProjectDataSource.ts b/src/features/projects/data/GitHubProjectDataSource.ts
index f8e1f8d8..4762ed3e 100644
--- a/src/features/projects/data/GitHubProjectDataSource.ts
+++ b/src/features/projects/data/GitHubProjectDataSource.ts
@@ -122,6 +122,7 @@ export default class GitHubProjectDataSource implements IProjectDataSource {
     const specifications = ref.files.filter(file => {
       return this.isOpenAPISpecification(file.name)
     }).map(file => {
+      const isFileChanged = ref.changedFiles?.includes(file.name) ?? false
       return {
         id: file.name,
         name: file.name,
@@ -132,16 +133,16 @@ export default class GitHubProjectDataSource implements IProjectDataSource {
           ref: ref.id
         }),
         editURL: `https://github.com/${ownerName}/${repositoryName}/edit/${ref.name}/${encodeURIComponent(file.name)}`,
-        diffURL: this.getGitHubDiffURL({
+        diffURL: isFileChanged ? this.getGitHubDiffURL({
           ownerName,
           repositoryName,
           path: file.name,
           baseRefOid: ref.baseRefOid,
           headRefOid: ref.id
-        }),
-        diffBaseBranch: ref.baseRef,
-        diffBaseOid: ref.baseRefOid,
-        diffPrUrl: ref.prNumber ? `https://github.com/${ownerName}/${repositoryName}/pull/${ref.prNumber}` : undefined,
+        }) : undefined,
+        diffBaseBranch: isFileChanged ? ref.baseRef : undefined,
+        diffBaseOid: isFileChanged ? ref.baseRefOid : undefined,
+        diffPrUrl: isFileChanged && ref.prNumber ? `https://github.com/${ownerName}/${repositoryName}/pull/${ref.prNumber}` : undefined,
         isDefault: false // initial value
       }
     }).sort((a, b) => a.name.localeCompare(b.name))
diff --git a/src/features/projects/data/GitHubRepositoryDataSource.ts b/src/features/projects/data/GitHubRepositoryDataSource.ts
index c107b506..6a776e34 100644
--- a/src/features/projects/data/GitHubRepositoryDataSource.ts
+++ b/src/features/projects/data/GitHubRepositoryDataSource.ts
@@ -51,6 +51,7 @@ type GraphQLPullRequest = {
   readonly headRefName: string
   readonly baseRefName: string
   readonly baseRefOid: string
+  readonly changedFiles: string[]
 }
 
 export default class GitHubProjectDataSource implements IGitHubRepositoryDataSource {
@@ -129,7 +130,8 @@ export default class GitHubProjectDataSource implements IGitHubRepositoryDataSou
             baseRef: pr?.baseRefName,
             baseRefOid: pr?.baseRefOid,
             prNumber: pr?.number,
-            files: branch.node.target.tree.entries
+            files: branch.node.target.tree.entries,
+            changedFiles: pr?.changedFiles
           }
         })
 
@@ -174,6 +176,11 @@ export default class GitHubProjectDataSource implements IGitHubRepositoryDataSou
                 headRefName
                 baseRefName
                 baseRefOid
+                files(first: 100) {
+                  nodes {
+                    path
+                  }
+                }
               }
             }
           }
@@ -199,15 +206,26 @@ export default class GitHubProjectDataSource implements IGitHubRepositoryDataSou
       const pullRequests = new Map<string, GraphQLPullRequest>()
 
       if (repoData?.pullRequests?.edges) {
-        const pullRequestEdges = repoData.pullRequests.edges as Edge<GraphQLPullRequest>[]
+        type RawGraphQLPullRequest = {
+          number: number
+          headRefName: string
+          baseRefName: string
+          baseRefOid: string
+          files?: {
+            nodes?: { path: string }[]
+          }
+        }
+        const pullRequestEdges = repoData.pullRequests.edges as Edge<RawGraphQLPullRequest>[]
 
         pullRequestEdges.forEach(edge => {
           const pr = edge.node
+          const changedFiles = pr.files?.nodes?.map(f => f.path) || []
           pullRequests.set(pr.headRefName, {
             number: pr.number,
             headRefName: pr.headRefName,
             baseRefName: pr.baseRefName,
-            baseRefOid: pr.baseRefOid
+            baseRefOid: pr.baseRefOid,
+            changedFiles
           })
         })
       }
diff --git a/src/features/projects/domain/IGitHubRepositoryDataSource.ts b/src/features/projects/domain/IGitHubRepositoryDataSource.ts
index eb331a95..c9c86e4e 100644
--- a/src/features/projects/domain/IGitHubRepositoryDataSource.ts
+++ b/src/features/projects/domain/IGitHubRepositoryDataSource.ts
@@ -24,10 +24,7 @@ export type GitHubRepositoryRef = {
   readonly files: {
     readonly name: string
   }[]
-}
-
-export default interface IGitHubRepositoryDataSource {
-  getRepositories(): Promise<GitHubRepository[]>
+  readonly changedFiles?: string[]
 }
 
 export default interface IGitHubRepositoryDataSource {
diff --git a/src/features/projects/view/toolbar/Selector.tsx b/src/features/projects/view/toolbar/Selector.tsx
index 4607d1f0..91261998 100644
--- a/src/features/projects/view/toolbar/Selector.tsx
+++ b/src/features/projects/view/toolbar/Selector.tsx
@@ -4,13 +4,16 @@ import {
   MenuItem,
   SelectChangeEvent,
   FormControl,
-  Typography
+  Typography,
+  Box,
+  Tooltip
 } from "@mui/material"
 import MenuItemHover from "@/common/ui/MenuItemHover"
 
 interface SelectorItem {
   readonly id: string
   readonly name: string
+  readonly hasChanges?: boolean
 }
 
 const Selector = ({
@@ -45,13 +48,29 @@ const Selector = ({
         {items.map(item => (
           <MenuItem key={item.id} value={item.id}>
             <MenuItemHover>
-              <Typography sx={{
-                overflow: "hidden",
-                whiteSpace: "nowrap",
-                textOverflow: "ellipsis"
-              }}>
-                {item.name}
-              </Typography>
+              <Box sx={{ display: "flex", alignItems: "center", gap: 0.5 }}>
+                <Typography sx={{
+                  overflow: "hidden",
+                  whiteSpace: "nowrap",
+                  textOverflow: "ellipsis"
+                }}>
+                  {item.name}
+                </Typography>
+                {item.hasChanges && (
+                  <Tooltip title="Has changes" arrow>
+                    <Box
+                      component="span"
+                      sx={{
+                        width: 6,
+                        height: 6,
+                        borderRadius: "50%",
+                        backgroundColor: "warning.main",
+                        flexShrink: 0
+                      }}
+                    />
+                  </Tooltip>
+                )}
+              </Box>
             </MenuItemHover>
           </MenuItem>
         ))}