diff --git a/packages/repl/src/lib/Output/AstNode.svelte b/packages/repl/src/lib/Output/AstNode.svelte
index 03f5ec69d0..381f19625e 100644
--- a/packages/repl/src/lib/Output/AstNode.svelte
+++ b/packages/repl/src/lib/Output/AstNode.svelte
@@ -92,7 +92,7 @@
 				<span class="token comment">{String(value)}</span>
 			{:else}
 				<span class="token {typeof value}">
-					{JSON.stringify(value)}
+					{typeof value === 'bigint' ? `${value}n` : JSON.stringify(value)}
 				</span>
 			{/if}
 		</span>
@@ -170,7 +170,8 @@
 		color: var(--shiki-token-string);
 	}
 
-	.token.number {
+	.token.number,
+	.token.bigint {
 		color: var(--shiki-token-constant);
 	}
 
diff --git a/packages/repl/src/lib/Output/srcdoc/index.html b/packages/repl/src/lib/Output/srcdoc/index.html
index 21f049cbcc..d93691525b 100644
--- a/packages/repl/src/lib/Output/srcdoc/index.html
+++ b/packages/repl/src/lib/Output/srcdoc/index.html
@@ -155,6 +155,11 @@
 								return { type: 'Set', value };
 							}
 
+							// if we don't handle bigints separately, they will cause JSON.stringify to blow up
+							if (typeof value === 'bigint') {
+								return { type: 'BigInt', value: value + '' };
+							}
+
 							return value;
 						});
 					} catch (error) {