diff --git a/services/project-history/app/js/HttpController.js b/services/project-history/app/js/HttpController.js
index 7c64ea8d26..d0880fea7b 100644
--- a/services/project-history/app/js/HttpController.js
+++ b/services/project-history/app/js/HttpController.js
@@ -23,7 +23,7 @@ const ONE_DAY_IN_SECONDS = 24 * 60 * 60
 
 const getProjectBlobSchema = z.object({
   params: z.object({
-    history_id: zz.objectId(),
+    history_id: zz.objectId().or(z.coerce.number()),
     hash: z.string(),
   }),
 })
diff --git a/services/project-history/test/acceptance/js/NumericProjectIdTests.js b/services/project-history/test/acceptance/js/NumericProjectIdTests.js
index d4d8180e9c..1575a358e4 100644
--- a/services/project-history/test/acceptance/js/NumericProjectIdTests.js
+++ b/services/project-history/test/acceptance/js/NumericProjectIdTests.js
@@ -136,4 +136,20 @@ describe('NumericProjectId', function () {
     })
     expect(response.statusCode).to.equal(200)
   })
+
+  it('should accept numeric history_id for getProjectBlob', async function () {
+    const blobHash = 'a'.repeat(40)
+    const blobContent = 'test blob content'
+
+    MockHistoryStore()
+      .get(`/api/projects/${this.historyId}/blobs/${blobHash}`)
+      .reply(200, blobContent)
+
+    const { response, body } = await makeRequest({
+      method: 'GET',
+      url: `http://127.0.0.1:3054/project/${this.historyId}/blob/${blobHash}`,
+    })
+    expect(response.statusCode).to.equal(200)
+    expect(body).to.equal(blobContent)
+  })
 })