diff --git a/src/api/response/iiif/manifest.js b/src/api/response/iiif/manifest.js
index 4cd9e96e..816bca5e 100644
--- a/src/api/response/iiif/manifest.js
+++ b/src/api/response/iiif/manifest.js
@@ -15,6 +15,7 @@ const {
 function transform(response) {
   if (response.statusCode === 200) {
     const builder = new IIIFBuilder();
+
     const openSearchResponse = JSON.parse(response.body);
     const source = openSearchResponse._source;
 
@@ -198,10 +199,6 @@ function transform(response) {
           ]);
         }
 
-        /** Add logo */
-
-        /** Add provider */
-
         /** Add items (Canvases) from a Work's Filesets */
         source.file_sets
           .filter((fileSet) => fileSet.role === "Access")
@@ -259,6 +256,38 @@ function transform(response) {
       }
     }
 
+    /** Add logo manually (w/o IIIF Builder) */
+    const nulLogo = {
+      id: "https://iiif.dc.library.northwestern.edu/iiif/2/00000000-0000-0000-0000-000000000003/full/pct:50/0/default.webp",
+      type: "Image",
+      format: "image/webp",
+      height: 139,
+      width: 1190,
+    };
+    jsonManifest.logo = [nulLogo];
+
+    /** Add provider manually (w/o IIIF Builder) */
+    const provider = {
+      id: "https://www.library.northwestern.edu/",
+      type: "Agent",
+      label: { none: ["Northwestern University Libraries"] },
+      homepage: [
+        {
+          id: "https://dc.library.northwestern.edu/",
+          type: "Text",
+          label: {
+            none: [
+              "Northwestern University Libraries Digital Collections Homepage",
+            ],
+          },
+          format: "text/html",
+          language: ["en"],
+        },
+      ],
+      logo: [nulLogo],
+    };
+    jsonManifest.provider = [provider];
+
     return {
       statusCode: 200,
       headers: {
diff --git a/src/helpers.js b/src/helpers.js
index f5b6f384..6ac00d2c 100644
--- a/src/helpers.js
+++ b/src/helpers.js
@@ -88,7 +88,7 @@ function ensureCharacterEncoding(response, defaultEncoding = "UTF-8") {
 
   if (!contentTypeHeader) {
     contentTypeHeader = "Content-Type";
-    response[contentTypeHeader] ||= "application/json; charset=UTF-8";
+    response.headers[contentTypeHeader] ||= "application/json; charset=UTF-8";
   }
 
   const value = parseHeader(response.headers[contentTypeHeader]);
diff --git a/test/unit/api/helpers.test.js b/test/unit/api/helpers.test.js
index 15bac641..b4009369 100644
--- a/test/unit/api/helpers.test.js
+++ b/test/unit/api/helpers.test.js
@@ -11,6 +11,7 @@ const {
   baseUrl,
   decodeEventBody,
   decodeToken,
+  ensureCharacterEncoding,
   isFromReadingRoom,
   maybeUseProxiedIp,
   normalizeHeaders,
@@ -403,4 +404,35 @@ describe("helpers", () => {
       expect(result.queryStringParameters).to.eql({});
     });
   });
+
+  describe("ensureCharacterEncoding", () => {
+    const response = { statusCode: 200, body: "Hello, World!" };
+
+    it("passes through an existing character set", () => {
+      const result = ensureCharacterEncoding({
+        ...response,
+        headers: { "Content-Type": "text/plain; charset=ISO-8859-1" },
+      });
+      expect(result.headers["Content-Type"]).to.eql(
+        "text/plain; charset=ISO-8859-1"
+      );
+    });
+
+    it("adds character set if it's missing", () => {
+      const result = ensureCharacterEncoding({
+        ...response,
+        headers: { "Content-Type": "text/plain" },
+      });
+      expect(result.headers["Content-Type"]).to.eql(
+        "text/plain; charset=UTF-8"
+      );
+    });
+
+    it("adds content type if it's missing", () => {
+      const result = ensureCharacterEncoding({ ...response, headers: {} });
+      expect(result.headers["Content-Type"]).to.eql(
+        "application/json; charset=UTF-8"
+      );
+    });
+  });
 });
diff --git a/test/unit/api/response/iiif/manifest.test.js b/test/unit/api/response/iiif/manifest.test.js
index 082cc5ff..208a3ac8 100644
--- a/test/unit/api/response/iiif/manifest.test.js
+++ b/test/unit/api/response/iiif/manifest.test.js
@@ -103,6 +103,36 @@ describe("Image Work as IIIF Manifest response transformer", () => {
     expect(partOf.summary.none).to.be.an("array").that.is.not.empty;
   });
 
+  it("populates Manifest logo", async () => {
+    const { manifest } = await setup();
+    const logo = manifest.logo[0];
+    expect(logo.id).to.eq(
+      "https://iiif.dc.library.northwestern.edu/iiif/2/00000000-0000-0000-0000-000000000003/full/pct:50/0/default.webp"
+    );
+  });
+
+  it("populates Manifest provider", async () => {
+    const { manifest } = await setup();
+    const provider = manifest.provider[0];
+    expect(provider.id).to.eq("https://www.library.northwestern.edu/");
+    expect(provider.label).to.deep.equal({
+      none: ["Northwestern University Libraries"],
+    });
+    expect(provider.homepage[0].id).to.eq(
+      "https://dc.library.northwestern.edu/"
+    );
+    expect(provider.homepage[0].label).to.deep.eq({
+      none: ["Northwestern University Libraries Digital Collections Homepage"],
+    });
+    expect(provider.logo[0]).to.deep.eq({
+      id: "https://iiif.dc.library.northwestern.edu/iiif/2/00000000-0000-0000-0000-000000000003/full/pct:50/0/default.webp",
+      type: "Image",
+      format: "image/webp",
+      height: 139,
+      width: 1190,
+    });
+  });
+
   it("populates Manifest items (canvases)", async () => {
     const { source, manifest } = await setup();
     expect(manifest.items.length).to.eq(3);