diff --git a/src/index.ts b/src/index.ts
index 122c32f..d4c0a2b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -8,7 +8,7 @@ import * as zodValidationError from 'zod-validation-error'
 import {flattenedProperties, incompatiblePropertyPairs, getDescription} from './json-schema'
 import {lineByLineConsoleLogger} from './logging'
 import {Logger, TrpcCliParams} from './types'
-import {looksLikeInstanceof} from './uitl'
+import {looksLikeInstanceof} from './util'
 import {parseProcedureInputs} from './zod-procedure'
 
 export * from './types'
diff --git a/src/uitl.ts b/src/util.ts
similarity index 100%
rename from src/uitl.ts
rename to src/util.ts
diff --git a/src/zod-procedure.ts b/src/zod-procedure.ts
index ddcc62c..24ef964 100644
--- a/src/zod-procedure.ts
+++ b/src/zod-procedure.ts
@@ -1,7 +1,7 @@
 import {z} from 'zod'
 import zodToJsonSchema from 'zod-to-json-schema'
 import type {Result, ParsedProcedure} from './types'
-import {looksLikeInstanceof} from './uitl'
+import {looksLikeInstanceof} from './util'
 
 function getInnerType(zodType: z.ZodType): z.ZodType {
   if (looksLikeInstanceof(zodType, z.ZodOptional) || looksLikeInstanceof(zodType, z.ZodNullable)) {