diff --git a/src/jsonifiable/schema/bigint.ts b/src/jsonifiable/schema/bigint.ts
index b0f0093..099d309 100644
--- a/src/jsonifiable/schema/bigint.ts
+++ b/src/jsonifiable/schema/bigint.ts
@@ -1,11 +1,12 @@
 import { z } from "zod"
 
 
-export const jsonifyBigIntSchema = <S extends z.ZodBigInt>(schema: S) =>
-    schema.transform(v => v.toString())
+export function jsonifyBigIntSchema<S extends z.ZodBigInt>(schema: S) {
+    return schema.transform(v => v.toString())
+}
 
-export const dejsonifyBigIntSchema = <S extends z.ZodBigInt>(schema: S) =>
-    z
+export function dejsonifyBigIntSchema<S extends z.ZodBigInt>(schema: S) {
+    return z
         .string()
         .transform(v => {
             try {
@@ -16,3 +17,4 @@ export const dejsonifyBigIntSchema = <S extends z.ZodBigInt>(schema: S) =>
             }
         })
         .pipe(schema)
+}
diff --git a/src/jsonifiable/schema/date.ts b/src/jsonifiable/schema/date.ts
index b5ac677..ea0ee6f 100644
--- a/src/jsonifiable/schema/date.ts
+++ b/src/jsonifiable/schema/date.ts
@@ -1,11 +1,12 @@
 import { z } from "zod"
 
 
-export const jsonifyDateSchema = <S extends z.ZodDate>(schema: S) =>
-    schema.transform(v => v.toString())
+export function jsonifyDateSchema<S extends z.ZodDate>(schema: S) {
+    return schema.transform(v => v.toString())
+}
 
-export const dejsonifyDateSchema = <S extends z.ZodDate>(schema: S) =>
-    z
+export function dejsonifyDateSchema<S extends z.ZodDate>(schema: S) {
+    return z
         .string()
         .transform(v => {
             try {
@@ -16,3 +17,4 @@ export const dejsonifyDateSchema = <S extends z.ZodDate>(schema: S) =>
             }
         })
         .pipe(schema)
+}
diff --git a/src/jsonifiable/schema/decimal.ts b/src/jsonifiable/schema/decimal.ts
index 58c492d..ca01261 100644
--- a/src/jsonifiable/schema/decimal.ts
+++ b/src/jsonifiable/schema/decimal.ts
@@ -2,11 +2,16 @@ import { Decimal } from "decimal.js"
 import { z } from "zod"
 
 
-export const jsonifyDecimalSchema = <S extends z.ZodType<Decimal, z.ZodTypeDef, Decimal>>(schema: S) =>
-    schema.transform(v => v.toJSON())
+export function jsonifyDecimalSchema<
+    S extends z.ZodType<Decimal, z.ZodTypeDef, Decimal>
+>(schema: S) {
+    return schema.transform(v => v.toJSON())
+}
 
-export const dejsonifyDecimalSchema = <S extends z.ZodType<Decimal, z.ZodTypeDef, Decimal>>(schema: S) =>
-    z
+export function dejsonifyDecimalSchema<
+    S extends z.ZodType<Decimal, z.ZodTypeDef, Decimal>
+>(schema: S) {
+    return z
         .string()
         .transform(v => {
             try {
@@ -17,3 +22,4 @@ export const dejsonifyDecimalSchema = <S extends z.ZodType<Decimal, z.ZodTypeDef
             }
         })
         .pipe(schema)
+}