diff --git a/src/core/Coin.spec.ts b/src/core/Coin.spec.ts
index a9caf8a..04cfb71 100644
--- a/src/core/Coin.spec.ts
+++ b/src/core/Coin.spec.ts
@@ -147,5 +147,19 @@ describe('Coin', () => {
       )
       expect(coin3).toEqual(coin4)
     })
+
+    it('parses denoms containing "-", "." and "_" (e.g. tokenfactory subdenoms)', () => {
+      const coin1 = new Coin('factory/init1abc/my-token_v1.5', 1001)
+      const coin2 = Coin.fromString('1001factory/init1abc/my-token_v1.5')
+      expect(coin1).toEqual(coin2)
+
+      // fromString(toString()) must round-trip for any valid Cosmos denom
+      expect(Coin.fromString(coin1.toString())).toEqual(coin1)
+    })
+
+    it('throws on a numeric-only string (a denom must start with a letter)', () => {
+      expect(() => Coin.fromString('5000')).toThrow()
+      expect(() => Coin.fromString('12')).toThrow()
+    })
   })
 })
diff --git a/src/core/Coin.ts b/src/core/Coin.ts
index 6d02557..6a2ab29 100644
--- a/src/core/Coin.ts
+++ b/src/core/Coin.ts
@@ -69,7 +69,9 @@ export class Coin extends JSONSerializable<Coin.Amino, Coin.Data, Coin.Proto> {
   }
 
   public static fromString(str: string): Coin {
-    const m = str.match(/^(-?[0-9]+(\.[0-9]+)?)([0-9a-zA-Z/]+)$/)
+    const m = str.match(
+      /^(-?[0-9]+(\.[0-9]+)?)([a-zA-Z][0-9a-zA-Z/:._-]{2,127})$/
+    )
     if (m === null) {
       throw new Error(`failed to parse to Coin: ${str}`)
     }