diff --git a/docs/generated/changelog.html b/docs/generated/changelog.html
index a100a90d0..12f33a7ed 100644
--- a/docs/generated/changelog.html
+++ b/docs/generated/changelog.html
@@ -12,6 +12,7 @@ <h1>Agent-JS Changelog</h1>
     <section>
       <h2>Version x.x.x</h2>
       <ul>
+        <li>feat: Principal class serializes to JSON</li>
         <li>
           feat: certificate checks validate that certificate time is not more than 5 minutes ahead
           of or behind system time.
diff --git a/packages/agent/src/canisterStatus/__snapshots__/index.test.ts.snap b/packages/agent/src/canisterStatus/__snapshots__/index.test.ts.snap
index 745b0263b..d502985f8 100644
--- a/packages/agent/src/canisterStatus/__snapshots__/index.test.ts.snap
+++ b/packages/agent/src/canisterStatus/__snapshots__/index.test.ts.snap
@@ -2,21 +2,7 @@
 
 exports[`Canister Status utility should query canister controllers 1`] = `
 Array [
-  Principal {
-    "_arr": Uint8Array [
-      0,
-      0,
-      0,
-      0,
-      0,
-      0,
-      0,
-      0,
-      1,
-      1,
-    ],
-    "_isPrincipal": true,
-  },
+  "rwlgt-iiaaa-aaaaa-aaaaa-cai",
 ]
 `;
 
@@ -36,21 +22,7 @@ exports[`Canister Status utility should support multiple requests 1`] = `2022-05
 
 exports[`Canister Status utility should support multiple requests 2`] = `
 Array [
-  Principal {
-    "_arr": Uint8Array [
-      0,
-      0,
-      0,
-      0,
-      0,
-      0,
-      0,
-      0,
-      1,
-      1,
-    ],
-    "_isPrincipal": true,
-  },
+  "rwlgt-iiaaa-aaaaa-aaaaa-cai",
 ]
 `;
 
diff --git a/packages/principal/src/index.test.ts b/packages/principal/src/index.test.ts
index e549a4417..92a9d510d 100644
--- a/packages/principal/src/index.test.ts
+++ b/packages/principal/src/index.test.ts
@@ -41,4 +41,15 @@ describe('Principal', () => {
     expect(anonymous.compareTo(principal1)).toBe('gt');
     expect(anonymous.compareTo(principal2)).toBe('gt');
   });
+
+  it('serializes to String constructor', () => {
+    const principal = Principal.fromText('ryjl3-tyaaa-aaaaa-aaaba-cai');
+    expect(principal.toString()).toBe('ryjl3-tyaaa-aaaaa-aaaba-cai');
+    expect(String(principal)).toBe('ryjl3-tyaaa-aaaaa-aaaba-cai');
+  });
+
+  it('serializes to JSON', () => {
+    const principal = Principal.fromText('ryjl3-tyaaa-aaaaa-aaaba-cai');
+    expect(JSON.stringify(principal)).toBe('"ryjl3-tyaaa-aaaaa-aaaba-cai"');
+  });
 });
diff --git a/packages/principal/src/index.ts b/packages/principal/src/index.ts
index 857282a60..92c19045f 100644
--- a/packages/principal/src/index.ts
+++ b/packages/principal/src/index.ts
@@ -107,6 +107,14 @@ export class Principal {
     return this.toText();
   }
 
+  /**
+   * Serializes to JSON
+   * @returns {string} string
+   */
+  public toJSON(): string {
+    return this.toText();
+  }
+
   /**
    * Utility method taking a Principal to compare against. Used for determining canister ranges in certificate verification
    * @param {Principal} other - a {@link Principal} to compare