diff --git a/src/prompt/elements/confirm.js b/src/prompt/elements/confirm.js
index 8a7a516..b4e227f 100644
--- a/src/prompt/elements/confirm.js
+++ b/src/prompt/elements/confirm.js
@@ -98,6 +98,9 @@ export default class ConfirmPrompt extends Prompt {
   }
 
   _(c, key) {
+    if (c === undefined) {
+      return;
+    }
     if (!Number.isNaN(Number.parseInt(c))) {
       const n = Number.parseInt(c) - 1;
       this.moveCursor(n);
diff --git a/src/prompt/elements/multiselect.js b/src/prompt/elements/multiselect.js
index d821fc0..fb0c7ba 100644
--- a/src/prompt/elements/multiselect.js
+++ b/src/prompt/elements/multiselect.js
@@ -73,6 +73,9 @@ export default class MultiselectPrompt extends Prompt {
   }
 
   _(c, key) {
+    if (c === undefined) {
+      return;
+    }
     if (c === ' ') {
       return this.toggle();
     }
diff --git a/src/prompt/elements/select.js b/src/prompt/elements/select.js
index ca89b88..03294be 100644
--- a/src/prompt/elements/select.js
+++ b/src/prompt/elements/select.js
@@ -55,6 +55,9 @@ export default class SelectPrompt extends Prompt {
 
   _(c, key) {
     if (this.timeout) clearTimeout(this.timeout);
+    if (c === undefined) {
+      return;
+    }
     if (!Number.isNaN(Number.parseInt(c))) {
       const n = Number.parseInt(c) - 1;
       this.moveCursor(n);
diff --git a/src/prompt/elements/text.js b/src/prompt/elements/text.js
index a83278d..45ba0ea 100644
--- a/src/prompt/elements/text.js
+++ b/src/prompt/elements/text.js
@@ -114,6 +114,9 @@ export default class TextPrompt extends Prompt {
   }
 
   _(c, key) {
+    if (c === undefined) {
+      return;
+    }
     let s1 = this.value.slice(0, this.cursor);
     let s2 = this.value.slice(this.cursor);
     this.value = `${s1}${c}${s2}`;
diff --git a/src/prompt/util/action.ts b/src/prompt/util/action.ts
index 3c70480..0106fcf 100644
--- a/src/prompt/util/action.ts
+++ b/src/prompt/util/action.ts
@@ -20,6 +20,7 @@ export const action = (key: Key, isSelect: boolean) => {
 
   if (key.name === 'return') return 'submit';
   if (key.name === 'enter') return 'submit'; // ctrl + J
+  if (key.code === 'OM') return 'submit'; // shift + enter
   if (key.name === 'backspace') return 'delete';
   if (key.name === 'delete') return 'deleteForward';
   if (key.name === 'abort') return 'abort';