diff --git a/README.md b/README.md
index aaf002fc..a1b34e8e 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@ class SomeClass
     @field({type: 'u64'})
     y: bigint
 
-    @field({type: 'string'})
+    @field({type: 'String'})
     z: string
 
     @field({type: option(vec('u32'))})
@@ -117,7 +117,7 @@ class TestStruct {
 }
 
 ```
-Variants can be 'number', 'number[]' (represents nested Rust Enums) or 'string' (not part of the Borsh specification). i.e.
+Variants can be 'number', 'number[]' (represents nested Rust Enums) or 'String' (not part of the Borsh specification). i.e.
 
 ```typescript 
 @variant(0)
@@ -154,7 +154,7 @@ class TestStruct {
 *With Borsh specification, string sizes will be encoded with 'u32'*
 ```typescript 
 class TestStruct {
-  @field({ type: 'string' })
+  @field({ type: 'String' })
   public string: string; 
 }
 ```
@@ -365,7 +365,7 @@ validate([TestStruct])
 | `f32` float           | `number`            |
 | `f64` float           | `number`            |
 | byte arrays           | `Uint8Array`        |
-| UTF-8 string          | `string`            |
+| String                | `string`            |
 | option                | `undefined` or type |
 | map                   | N/A                 |
 | set                   | N/A                 |
diff --git a/src/__tests__/index.test.ts b/src/__tests__/index.test.ts
index 8b0a58bf..73e902fd 100644
--- a/src/__tests__/index.test.ts
+++ b/src/__tests__/index.test.ts
@@ -440,7 +440,7 @@ describe("arrays", () => {
 
     test("can deserialize large arrays", () => {
       class TestStruct {
-        @field({ type: vec("string") })
+        @field({ type: vec("String") })
         public a: string[];
       }
       const size = 1024 * 1024 + 100;
@@ -1279,7 +1279,7 @@ describe("enum", () => {
 
   test("enum string variant", () => {
     class Ape {
-      @field({ type: "string" })
+      @field({ type: "String" })
       name: string;
 
       constructor(name?: string) {
@@ -1387,7 +1387,7 @@ describe("option", () => {
 
   test("empty string option", () => {
     class TestStruct {
-      @field({ type: option("string") })
+      @field({ type: option("String") })
       string: string;
 
       constructor(string: string) {
@@ -1429,15 +1429,15 @@ describe("option", () => {
   });
 });
 
-describe("string", () => {
+describe("String", () => {
   class TestStruct {
-    @field({ type: "string" })
+    @field({ type: "String" })
     public a: string;
 
     @field({ type: "u8" })
     public b: number;
 
-    @field({ type: "string" })
+    @field({ type: "String" })
     public c: string;
 
     constructor(a: string, b: number, c: string) {
@@ -1934,8 +1934,8 @@ describe("discriminator", () => {
 
     @variant("abc")
     class D extends C {
-      @field({ type: "string" })
-      string: string = "string";
+      @field({ type: "String" })
+      string: string = "String";
     }
 
     const discriminator = getDiscriminator(D);
@@ -1947,8 +1947,8 @@ describe("discriminator", () => {
   test("will reject for undefined behahiour, with super variant", () => {
     @variant([1, 2])
     class A {
-      @field({ type: "string" })
-      string: string = "string";
+      @field({ type: "String" })
+      string: string = "String";
     }
     @variant(3)
     class B extends A {}
@@ -1957,8 +1957,8 @@ describe("discriminator", () => {
 
   test("will reject for undefined behahiour, without super variant", () => {
     class A {
-      @field({ type: "string" })
-      string: string = "string";
+      @field({ type: "String" })
+      string: string = "String";
     }
     @variant(3)
     class B extends A {}
@@ -2019,12 +2019,12 @@ describe("Validation", () => {
     }
 
     class A extends Super {
-      @field({ type: "string" })
+      @field({ type: "String" })
       string: string;
     }
 
     class B extends Super {
-      @field({ type: "string" })
+      @field({ type: "String" })
       string: string;
     }
     expect(() => validate(Super)).toThrowError(BorshError);
@@ -2118,12 +2118,12 @@ describe("Validation", () => {
     }
 
     class A extends TestStruct {
-      @field({ type: "string" })
+      @field({ type: "String" })
       string: string = "A";
     }
 
     class B extends TestStruct {
-      @field({ type: "string" })
+      @field({ type: "String" })
       string: string = "B";
     }
     expect(() =>
@@ -2252,7 +2252,7 @@ describe("Validation", () => {
 describe("deserialize input type", () => {
   test("buffer compat", () => {
     class Clazz {
-      @field({ type: "string" })
+      @field({ type: "String" })
       string: string;
 
       constructor(string?: string) {
@@ -2311,7 +2311,7 @@ describe("deserialize input type", () => {
 
   test("can alternate between", () => {
     class Clazz {
-      @field({ type: option("string") })
+      @field({ type: option("String") })
       string?: string;
 
       constructor(string?: string) {
diff --git a/src/binary.ts b/src/binary.ts
index e5e7aae0..3e6854c2 100644
--- a/src/binary.ts
+++ b/src/binary.ts
@@ -275,7 +275,7 @@ export class BinaryWriter {
     else if (encoding === 'f64') {
       return BinaryWriter.f64
     }
-    else if (encoding === 'string') {
+    else if (encoding === 'String') {
       return BinaryWriter.string
     }
     else {
@@ -508,7 +508,7 @@ export class BinaryReader {
     else if (encoding === 'u512') {
       return BinaryReader.u512
     }
-    else if (encoding === 'string') {
+    else if (encoding === 'String') {
       return fromBuffer ? BinaryReader.bufferString : BinaryReader.string
     }
     else if (encoding === 'bool') {
@@ -550,4 +550,4 @@ export class BinaryReader {
     }
     return result;
   }
-}
\ No newline at end of file
+}
diff --git a/src/types.ts b/src/types.ts
index caefaf3f..8a993d38 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -49,7 +49,7 @@ export type IntegerType =
 export type FloatType = 'f32' | 'f64';
 
 export type PrimitiveType = "bool"
-  | "string"
+  | "String"
   | IntegerType
   | FloatType