diff --git a/src/graphql.ts b/src/graphql.ts
index 60c847fb..60005294 100644
--- a/src/graphql.ts
+++ b/src/graphql.ts
@@ -185,3 +185,20 @@ export function isGeneratedByIntrospection(schema: GraphQLSchema): boolean {
     .filter(([name, type]) => !name.startsWith('__') && !isSpecifiedScalarType(type))
     .every(([, type]) => type.astNode === undefined)
 }
+
+// https://spec.graphql.org/October2021/#EscapedCharacter
+const escapeMap: { [key: string]: string } = {
+  '\"': '\\\"',
+  '\\': '\\\\',
+  '\/': '\\/',
+  '\b': '\\b',
+  '\f': '\\f',
+  '\n': '\\n',
+  '\r': '\\r',
+  '\t': '\\t',
+};
+
+export function escapeGraphQLCharacters(input: string): string {
+  // eslint-disable-next-line regexp/no-escape-backspace
+  return input.replace(/["\\/\f\n\r\t\b]/g, match => escapeMap[match]);
+}
diff --git a/src/myzod/index.ts b/src/myzod/index.ts
index ca44c10f..0cfbdf15 100644
--- a/src/myzod/index.ts
+++ b/src/myzod/index.ts
@@ -22,6 +22,7 @@ import type { Visitor } from '../visitor';
 import {
   InterfaceTypeDefinitionBuilder,
   ObjectTypeDefinitionBuilder,
+  escapeGraphQLCharacters,
   isInput,
   isListType,
   isNamedType,
@@ -282,7 +283,7 @@ function generateFieldTypeMyZodSchema(config: ValidationSchemaPluginConfig, visi
         appliedDirectivesGen = `${appliedDirectivesGen}.default(${defaultValue.value})`;
 
       if (defaultValue?.kind === Kind.STRING || defaultValue?.kind === Kind.ENUM)
-        appliedDirectivesGen = `${appliedDirectivesGen}.default("${defaultValue.value}")`;
+        appliedDirectivesGen = `${appliedDirectivesGen}.default("${escapeGraphQLCharacters(defaultValue.value)}")`;
     }
 
     if (isNonNullType(parentType)) {
diff --git a/src/yup/index.ts b/src/yup/index.ts
index 4d654fb4..e5763dae 100644
--- a/src/yup/index.ts
+++ b/src/yup/index.ts
@@ -22,6 +22,7 @@ import type { Visitor } from '../visitor';
 import {
   InterfaceTypeDefinitionBuilder,
   ObjectTypeDefinitionBuilder,
+  escapeGraphQLCharacters,
   isInput,
   isListType,
   isNamedType,
@@ -284,7 +285,7 @@ function shapeFields(fields: readonly (FieldDefinitionNode | InputValueDefinitio
         }
 
         if (defaultValue?.kind === Kind.STRING || defaultValue?.kind === Kind.ENUM)
-          fieldSchema = `${fieldSchema}.default("${defaultValue.value}")`;
+          fieldSchema = `${fieldSchema}.default("${escapeGraphQLCharacters(defaultValue.value)}")`;
       }
 
       if (isNonNullType(field.type))
diff --git a/src/zod/index.ts b/src/zod/index.ts
index e5bd802f..739c892b 100644
--- a/src/zod/index.ts
+++ b/src/zod/index.ts
@@ -22,6 +22,7 @@ import type { Visitor } from '../visitor';
 import {
   InterfaceTypeDefinitionBuilder,
   ObjectTypeDefinitionBuilder,
+  escapeGraphQLCharacters,
   isInput,
   isListType,
   isNamedType,
@@ -295,7 +296,7 @@ function generateFieldTypeZodSchema(config: ValidationSchemaPluginConfig, visito
         appliedDirectivesGen = `${appliedDirectivesGen}.default(${defaultValue.value})`;
 
       if (defaultValue?.kind === Kind.STRING || defaultValue?.kind === Kind.ENUM)
-        appliedDirectivesGen = `${appliedDirectivesGen}.default("${defaultValue.value}")`;
+        appliedDirectivesGen = `${appliedDirectivesGen}.default("${escapeGraphQLCharacters(defaultValue.value)}")`;
     }
 
     if (isNonNullType(parentType)) {
diff --git a/tests/graphql.spec.ts b/tests/graphql.spec.ts
index 5f65ff39..1ba0376c 100644
--- a/tests/graphql.spec.ts
+++ b/tests/graphql.spec.ts
@@ -12,7 +12,7 @@ import {
 } from 'graphql';
 import dedent from 'ts-dedent';
 
-import { ObjectTypeDefinitionBuilder, isGeneratedByIntrospection, topologicalSortAST, topsort } from '../src/graphql';
+import { ObjectTypeDefinitionBuilder, escapeGraphQLCharacters, isGeneratedByIntrospection, topologicalSortAST, topsort } from '../src/graphql';
 
 describe('graphql', () => {
   describe('objectTypeDefinitionBuilder', () => {
@@ -297,3 +297,65 @@ describe('isGeneratedByIntrospection function', () => {
     expect(isGeneratedByIntrospection(clientSchema)).toBe(true);
   });
 });
+
+describe('escapeGraphQLCharacters', () => {
+  it('should escape double quotes', () => {
+    const input = 'This is a "test" string.';
+    const expected = 'This is a \\\"test\\\" string.';
+    expect(escapeGraphQLCharacters(input)).toBe(expected);
+  });
+
+  it('should escape backslashes', () => {
+    const input = 'This is a backslash: \\';
+    const expected = 'This is a backslash: \\\\';
+    expect(escapeGraphQLCharacters(input)).toBe(expected);
+  });
+
+  it('should escape forward slashes', () => {
+    const input = 'This is a forward slash: /';
+    const expected = 'This is a forward slash: \\/';
+    expect(escapeGraphQLCharacters(input)).toBe(expected);
+  });
+
+  it('should escape backspaces', () => {
+    const input = 'This is a backspace: \b';
+    const expected = 'This is a backspace: \\b';
+    expect(escapeGraphQLCharacters(input)).toBe(expected);
+  });
+
+  it('should escape form feeds', () => {
+    const input = 'This is a form feed: \f';
+    const expected = 'This is a form feed: \\f';
+    expect(escapeGraphQLCharacters(input)).toBe(expected);
+  });
+
+  it('should escape new lines', () => {
+    const input = 'This is a new line: \n';
+    const expected = 'This is a new line: \\n';
+    expect(escapeGraphQLCharacters(input)).toBe(expected);
+  });
+
+  it('should escape carriage returns', () => {
+    const input = 'This is a carriage return: \r';
+    const expected = 'This is a carriage return: \\r';
+    expect(escapeGraphQLCharacters(input)).toBe(expected);
+  });
+
+  it('should escape horizontal tabs', () => {
+    const input = 'This is a tab: \t';
+    const expected = 'This is a tab: \\t';
+    expect(escapeGraphQLCharacters(input)).toBe(expected);
+  });
+
+  it('should escape multiple special characters', () => {
+    const input = 'This is a "test" string with \n new line and \t tab.';
+    const expected = 'This is a \\\"test\\\" string with \\n new line and \\t tab.';
+    expect(escapeGraphQLCharacters(input)).toBe(expected);
+  });
+
+  it('should not escape non-special characters', () => {
+    const input = 'Normal string with no special characters.';
+    const expected = 'Normal string with no special characters.';
+    expect(escapeGraphQLCharacters(input)).toBe(expected);
+  });
+});
diff --git a/tests/myzod.spec.ts b/tests/myzod.spec.ts
index cd9bc95a..f5753b10 100644
--- a/tests/myzod.spec.ts
+++ b/tests/myzod.spec.ts
@@ -1376,6 +1376,7 @@ describe('myzod', () => {
       input PageInput {
         pageType: PageType! = PUBLIC
         greeting: String = "Hello"
+        newline: String = "Hello\\nWorld"
         score: Int = 100
         ratio: Float = 0.5
         isMember: Boolean = true
@@ -1399,6 +1400,7 @@ describe('myzod', () => {
         return myzod.object({
           pageType: PageTypeSchema.default("PUBLIC"),
           greeting: myzod.string().default("Hello").optional().nullable(),
+          newline: myzod.string().default("Hello\\nWorld").optional().nullable(),
           score: myzod.number().default(100).optional().nullable(),
           ratio: myzod.number().default(0.5).optional().nullable(),
           isMember: myzod.boolean().default(true).optional().nullable()
diff --git a/tests/yup.spec.ts b/tests/yup.spec.ts
index bd927891..c23d71b9 100644
--- a/tests/yup.spec.ts
+++ b/tests/yup.spec.ts
@@ -1400,6 +1400,7 @@ describe('yup', () => {
       input PageInput {
         pageType: PageType! = PUBLIC
         greeting: String = "Hello"
+        newline: String = "Hello\\nWorld"
         score: Int = 100
         ratio: Float = 0.5
         isMember: Boolean = true
@@ -1423,6 +1424,7 @@ describe('yup', () => {
         return yup.object({
           pageType: PageTypeSchema.nonNullable().default("PUBLIC"),
           greeting: yup.string().defined().nullable().default("Hello").optional(),
+          newline: yup.string().defined().nullable().default("Hello\\nWorld").optional(),
           score: yup.number().defined().nullable().default(100).optional(),
           ratio: yup.number().defined().nullable().default(0.5).optional(),
           isMember: yup.boolean().defined().nullable().default(true).optional()
diff --git a/tests/zod.spec.ts b/tests/zod.spec.ts
index 75b93d1a..0fb1a324 100644
--- a/tests/zod.spec.ts
+++ b/tests/zod.spec.ts
@@ -539,6 +539,7 @@ describe('zod', () => {
       input PageInput {
         pageType: PageType! = PUBLIC
         greeting: String = "Hello"
+        newline: String = "Hello\\nWorld"
         score: Int = 100
         ratio: Float = 0.5
         isMember: Boolean = true
@@ -562,6 +563,7 @@ describe('zod', () => {
         return z.object({
           pageType: PageTypeSchema.default("PUBLIC"),
           greeting: z.string().default("Hello").nullish(),
+          newline: z.string().default("Hello\\nWorld").nullish(),
           score: z.number().default(100).nullish(),
           ratio: z.number().default(0.5).nullish(),
           isMember: z.boolean().default(true).nullish()