diff --git a/apps/server/src/services/icon_packs.spec.ts b/apps/server/src/services/icon_packs.spec.ts
index 4f41258b44..68ee6ca2b0 100644
--- a/apps/server/src/services/icon_packs.spec.ts
+++ b/apps/server/src/services/icon_packs.spec.ts
@@ -1,6 +1,21 @@
 import { buildNote } from "../test/becca_easy_mocking";
 import { determineBestFontAttachment, generateCss, IconPackManifest, processIconPack } from "./icon_packs";
 
+const manifest: IconPackManifest = {
+    name: "Boxicons v2",
+    prefix: "bx",
+    icons: {
+        "bx-ball": "\ue9c2",
+        "bxs-party": "\uec92"
+    }
+};
+
+const defaultAttachment = {
+    role: "file",
+    title: "Font",
+    mime: "font/woff2"
+};
+
 describe("Processing icon packs", () => {
     it("doesn't crash if icon pack is incorrect type", () => {
         const iconPack = processIconPack(buildNote({
@@ -11,18 +26,12 @@ describe("Processing icon packs", () => {
     });
 
     it("processes manifest", () => {
-        const manifest: IconPackManifest = {
-            name: "Boxicons v2",
-            prefix: "bx",
-            icons: {
-                "bx-ball": "\ue9c2",
-                "bxs-party": "\uec92"
-            }
-        };
         const iconPack = processIconPack(buildNote({
             type: "text",
-            content: JSON.stringify(manifest)
+            content: JSON.stringify(manifest),
+            attachments: [ defaultAttachment ]
         }));
+        expect(iconPack).toBeTruthy();
         expect(iconPack?.manifest).toMatchObject(manifest);
     });
 });
@@ -31,13 +40,7 @@ describe("Mapping attachments", () => {
     it("handles woff2", () => {
         const iconPackNote = buildNote({
             type: "text",
-            attachments: [
-                {
-                    role: "file",
-                    title: "Font",
-                    mime: "font/woff2"
-                }
-            ]
+            attachments: [ defaultAttachment ]
         });
         const attachment = determineBestFontAttachment(iconPackNote);
         expect(attachment?.mime).toStrictEqual("font/woff2");
@@ -109,7 +112,7 @@ describe("CSS generation", () => {
                 "bxs-party": "\uec92"
             }
         };
-        const iconPackNote = buildNote({
+        const processedResult = processIconPack(buildNote({
             type: "text",
             content: JSON.stringify(manifest),
             attachments: [
@@ -119,13 +122,12 @@ describe("CSS generation", () => {
                     mime: "font/woff2"
                 }
             ]
-        });
-        const processedResult = processIconPack(iconPackNote);
+        }));
         expect(processedResult).toBeTruthy();
-        const css = generateCss(processedResult!, iconPackNote);
+        const css = generateCss(processedResult!);
 
-        console.log(css);
         expect(css).toContain("@font-face");
         expect(css).toContain("font-family: 'trilium-icon-pack-bx'");
+        expect(css).toContain(`src: url('/api/attachments/${processedResult?.fontAttachmentId}/download') format('woff2');`);
     });
 });
diff --git a/apps/server/src/services/icon_packs.ts b/apps/server/src/services/icon_packs.ts
index a9fbaa7471..816160366c 100644
--- a/apps/server/src/services/icon_packs.ts
+++ b/apps/server/src/services/icon_packs.ts
@@ -6,7 +6,13 @@ const PREFERRED_MIME_TYPE = [
     "font/woff2",
     "font/woff",
     "font/ttf"
-];
+] as const;
+
+const MIME_TO_CSS_FORMAT_MAPPINGS: Record<typeof PREFERRED_MIME_TYPE[number], string> = {
+    "font/ttf": "truetype",
+    "font/woff": "woff",
+    "font/woff2": "woff2"
+};
 
 export interface IconPackManifest {
     name: string;
@@ -16,6 +22,8 @@ export interface IconPackManifest {
 
 interface ProcessResult {
     manifest: IconPackManifest;
+    fontMime: string;
+    fontAttachmentId: string;
 }
 
 export function processIconPack(iconPackNote: BNote): ProcessResult | undefined {
@@ -25,8 +33,16 @@ export function processIconPack(iconPackNote: BNote): ProcessResult | undefined
         return;
     }
 
+    const attachment = determineBestFontAttachment(iconPackNote);
+    if (!attachment || !attachment.attachmentId) {
+        log.error(`Icon pack is missing WOFF/WOFF2/TTF attachment: ${iconPackNote.title} (${iconPackNote.noteId})`);
+        return;
+    }
+
     return {
-        manifest
+        manifest,
+        fontMime: attachment.mime,
+        fontAttachmentId: attachment.attachmentId
     };
 }
 
@@ -46,12 +62,13 @@ export function determineBestFontAttachment(iconPackNote: BNote) {
     return null;
 }
 
-export function generateCss(processedIconPack: ProcessResult, iconPackNote: BNote) {
+export function generateCss(processedIconPack: ProcessResult) {
     return `\
         @font-face {
             font-family: 'trilium-icon-pack-${processedIconPack.manifest.prefix}';
             font-weight: normal;
             font-style: normal;
+            src: url('/api/attachments/${processedIconPack.fontAttachmentId}/download') format('${MIME_TO_CSS_FORMAT_MAPPINGS[processedIconPack.fontMime]}');
         }
     `;
 }
diff --git a/apps/server/src/test/becca_easy_mocking.ts b/apps/server/src/test/becca_easy_mocking.ts
index b36a9cdb3c..d809baa7f9 100644
--- a/apps/server/src/test/becca_easy_mocking.ts
+++ b/apps/server/src/test/becca_easy_mocking.ts
@@ -4,7 +4,7 @@ import BAttachment from "../becca/entities/battachment.js";
 import BAttribute from "../becca/entities/battribute.js";
 import BBranch from "../becca/entities/bbranch.js";
 import BNote from "../becca/entities/bnote.js";
-import utils from "../services/utils.js";
+import utils, { randomString } from "../services/utils.js";
 
 type AttributeDefinitions = { [key in `#${string}`]: string; };
 type RelationDefinitions = { [key in `~${string}`]: string; };
@@ -118,6 +118,7 @@ export function buildNote(noteDef: NoteDefinition) {
         const allAttachments: BAttachment[] = [];
         for (const { title, role, mime } of noteDef.attachments) {
             const attachment = new BAttachment({
+                attachmentId: randomString(10),
                 ownerId: note.noteId,
                 title,
                 role,