diff --git a/website/src/components/code.js b/website/src/components/code.js
index d4b15513b..93c4cf519 100644
--- a/website/src/components/code.js
+++ b/website/src/components/code.js
@@ -174,7 +174,7 @@ function formatCode(html, lang, prompt) {
                     .split(' | ')
                     .map((l, i) => convertLine(l, i))
                     .map((l, j) => (
-                        <Fragment>
+                        <Fragment key={j}>
                             {j !== 0 && <span> | </span>}
                             {l}
                         </Fragment>
diff --git a/website/src/widgets/languages.js b/website/src/widgets/languages.js
index 14c3f23bf..60511a984 100644
--- a/website/src/widgets/languages.js
+++ b/website/src/widgets/languages.js
@@ -71,7 +71,9 @@ const Languages = () => (
                                     <strong>{name}:</strong>{' '}
                                     {join(
                                         dependencies.map((dep, i) => (
-                                            <Link to={dep.url}>{dep.name}</Link>
+                                            <Link key={i} to={dep.url}>
+                                                {dep.name}
+                                            </Link>
                                         ))
                                     )}
                                 </Li>