diff --git a/package.json b/package.json
index 26eb896a1..c821f2532 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
         "eslint-plugin-promise": "4.2.1",
         "eslint-plugin-standard": "4.0.1",
         "fast-deep-equal": "3.1.3",
-        "flowchart.js": "1.14.3",
+        "flowchart.js": "1.15.0",
         "fork-awesome": "1.1.7",
         "highlight.js": "10.2.1",
         "i18next": "19.8.2",
diff --git a/src/components/markdown-renderer/replace-components/flow/flowchart/flowchart.tsx b/src/components/markdown-renderer/replace-components/flow/flowchart/flowchart.tsx
index 6b84d87e8..6a75243e0 100644
--- a/src/components/markdown-renderer/replace-components/flow/flowchart/flowchart.tsx
+++ b/src/components/markdown-renderer/replace-components/flow/flowchart/flowchart.tsx
@@ -27,7 +27,7 @@ export const FlowChart: React.FC<FlowChartProps> = ({ code }) => {
         parserOutput.drawSVG(currentDiagramRef, {
           'line-width': 2,
           fill: 'none',
-          'font-size': '16px',
+          'font-size': 16,
           'line-color': darkModeActivated ? '#ffffff' : '#000000',
           'element-color': darkModeActivated ? '#ffffff' : '#000000',
           'font-family': 'Source Code Pro, "Twemoji Mozilla", monospace'
diff --git a/src/external-types/flowchart.js/index.d.ts b/src/external-types/flowchart.js/index.d.ts
deleted file mode 100644
index d98d48a2e..000000000
--- a/src/external-types/flowchart.js/index.d.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-declare module 'flowchart.js' {
-  export interface Options {
-    'line-width': number,
-    'fill': string,
-    'font-size': string,
-    'font-family': string,
-    'font-color': string,
-    'line-color': string,
-    'element-color': string
-  }
-  export interface ParseOutput {
-    clean: () => void,
-    drawSVG: (container: HTMLElement, options: Partial<Options>) => void,
-  }
-  export function parse(code: string): ParseOutput
-}
diff --git a/yarn.lock b/yarn.lock
index fe1525b5f..7c3719e28 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6758,10 +6758,10 @@ flatten@^1.0.2:
   resolved "https://registry.yarnpkg.com/flatten/-/flatten-1.0.3.tgz#c1283ac9f27b368abc1e36d1ff7b04501a30356b"
   integrity sha512-dVsPA/UwQ8+2uoFe5GHtiBMu48dWLTdsuEd7CKGlZlD78r1TTWBvDuFaFGKCo/ZfEr95Uk56vZoX86OsHkUeIg==
 
-flowchart.js@1.14.3:
-  version "1.14.3"
-  resolved "https://registry.yarnpkg.com/flowchart.js/-/flowchart.js-1.14.3.tgz#b203df7621871eed11d0caffce931d1b6b01b300"
-  integrity sha512-PluLllc7xeMoowH0xOFXpfehEpJeToSb1iMZZ8vUu5vgMC5+Ft3K6NRPZ+4Wp1pa8aJy38aiDRAHdMOqW6HG/g==
+flowchart.js@1.15.0:
+  version "1.15.0"
+  resolved "https://registry.yarnpkg.com/flowchart.js/-/flowchart.js-1.15.0.tgz#132ba2df14af0a65e67280026ef05a1ffd16569f"
+  integrity sha512-IyCVUFfHPLPgKLynw3NCkZ7CvKJdc/bAu0aHm+2AxKhtSBCiUC1kcTX1KautC3HOp1A2JS1IOcYxDTmcMkx5nQ==
   dependencies:
     raphael "2.3.0"