diff --git a/.changeset/better-bags-shout.md b/.changeset/better-bags-shout.md
new file mode 100644
index 00000000..565c39a7
--- /dev/null
+++ b/.changeset/better-bags-shout.md
@@ -0,0 +1,6 @@
+---
+"@clack/prompts": patch
+"@clack/core": patch
+---
+
+Update sisteransi to 2.x (ESM only).
diff --git a/packages/core/package.json b/packages/core/package.json
index 6ff8beea..c84fb4cd 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -56,7 +56,7 @@
   },
   "dependencies": {
     "fast-wrap-ansi": "^0.2.0",
-    "sisteransi": "^1.0.5"
+    "sisteransi": "^2.0.0"
   },
   "devDependencies": {
     "arktype": "^2.2.0",
diff --git a/packages/prompts/package.json b/packages/prompts/package.json
index 70f3c87a..62c3af94 100644
--- a/packages/prompts/package.json
+++ b/packages/prompts/package.json
@@ -58,7 +58,7 @@
     "@clack/core": "workspace:*",
     "fast-string-width": "^3.0.2",
     "fast-wrap-ansi": "^0.2.0",
-    "sisteransi": "^1.0.5"
+    "sisteransi": "^2.0.0"
   },
   "devDependencies": {
     "is-unicode-supported": "^1.3.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index df5bdc3d..b0eb3a9b 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -70,8 +70,8 @@ importers:
         specifier: ^0.2.0
         version: 0.2.0
       sisteransi:
-        specifier: ^1.0.5
-        version: 1.0.5
+        specifier: ^2.0.0
+        version: 2.0.0
     devDependencies:
       arktype:
         specifier: ^2.2.0
@@ -92,8 +92,8 @@ importers:
         specifier: ^0.2.0
         version: 0.2.0
       sisteransi:
-        specifier: ^1.0.5
-        version: 1.0.5
+        specifier: ^2.0.0
+        version: 2.0.0
     devDependencies:
       is-unicode-supported:
         specifier: ^1.3.0
@@ -1652,8 +1652,9 @@ packages:
     resolution: {integrity: sha512-bzyZ1e88w9O1iNJbKnOlvYTrWPDl46O1bG0D3XInv+9tkPrxrN8jUUTiFlDkkmKWgn1M6CfIA13SuGqOa9Korw==}
     engines: {node: '>=14'}
 
-  sisteransi@1.0.5:
-    resolution: {integrity: sha512-bLGGlR1QxBcynn2d5YmDX4MGjlZvy2MRBDRNHLJ8VI6l6+9FUiyTFNJ0IveOSP0bcXgVDPRcfGqA0pjaqUpfVg==}
+  sisteransi@2.0.0:
+    resolution: {integrity: sha512-2WCqLdt12eN6ehLI50S2/ZxoowXU3DD1KVPRyVP0WEsFahrGZZmCdq1K59qjJljMRIDTwx1D9YaRK+hDneBUMg==}
+    engines: {node: '>=20'}
 
   slash@3.0.0:
     resolution: {integrity: sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==}
@@ -3366,7 +3367,7 @@ snapshots:
 
   signal-exit@4.1.0: {}
 
-  sisteransi@1.0.5: {}
+  sisteransi@2.0.0: {}
 
   slash@3.0.0: {}