diff --git a/src/schema/jsonified/date.ts b/src/schema/jsonified/date.ts
index ff4d0a1..8af03cd 100644
--- a/src/schema/jsonified/date.ts
+++ b/src/schema/jsonified/date.ts
@@ -1,29 +1,19 @@
-import { identity } from "lodash-es"
-import { Opaque } from "type-fest"
 import { z } from "zod"
 
 
-export type JsonifiedDate = Opaque<string, "@thilawyn/zod-schema-class/JsonifiedDate">
+export type JsonifiedDateBrand = "@thilawyn/zod-schema-class/JsonifiedDate"
 
 
 export function jsonifyDateSchema<S extends z.ZodType<Date>>(schema: S) {
-    return schema.transform(v => v.toString() as JsonifiedDate)
+    return schema
+        .transform(v => v.toString())
+        .brand<JsonifiedDateBrand>()
 }
 
 export function dejsonifyDateSchema<S extends z.ZodType<Date>>(schema: S) {
     return z
-        .custom<JsonifiedDate>(identity)
-        .pipe(
-            z
-                .string()
-                .transform(v => {
-                    try {
-                        return new Date(v)
-                    }
-                    catch (e) {
-                        return v
-                    }
-                })
-        )
+        .custom<string & z.BRAND<JsonifiedDateBrand>>()
+        .pipe(z.string())
+        .pipe(z.coerce.date())
         .pipe(schema)
 }
diff --git a/src/schema/jsonified/decimal.ts b/src/schema/jsonified/decimal.ts
index eb500a6..e638a80 100644
--- a/src/schema/jsonified/decimal.ts
+++ b/src/schema/jsonified/decimal.ts
@@ -1,19 +1,19 @@
 import { Decimal } from "decimal.js"
-import { identity } from "lodash-es"
-import { Opaque } from "type-fest"
 import { z } from "zod"
 
 
-export type JsonifiedDecimal = Opaque<string, "@thilawyn/zod-schema-class/JsonifiedDecimal">
+export type JsonifiedDecimalBrand = "@thilawyn/zod-schema-class/JsonifiedDecimal"
 
 
 export function jsonifyDecimalSchema<S extends z.ZodType<Decimal>>(schema: S) {
-    return schema.transform(v => v.toJSON() as JsonifiedDecimal)
+    return schema
+        .transform(v => v.toJSON())
+        .brand<JsonifiedDecimalBrand>()
 }
 
 export function dejsonifyDecimalSchema<S extends z.ZodType<Decimal>>(schema: S) {
     return z
-        .custom<JsonifiedDecimal>(identity)
+        .custom<string & z.BRAND<JsonifiedDecimalBrand>>()
         .pipe(
             z
                 .string()
diff --git a/src/schema/jsonified/option.ts b/src/schema/jsonified/option.ts
index 4e60ca6..c2b45a4 100644
--- a/src/schema/jsonified/option.ts
+++ b/src/schema/jsonified/option.ts
@@ -1,13 +1,10 @@
 import { Option } from "effect"
 import { identity } from "lodash-es"
-import { Jsonifiable, Opaque } from "type-fest"
 import { z } from "zod"
 import { ZodEffectOption, ZodEffectOptionNone, ZodEffectOptionSome, effectOptionNoneSchema, effectOptionSomeInnerSchema, effectOptionSomeSchema } from "../effect"
 
 
-export type JsonifiedEffectOption<T extends Jsonifiable> = Opaque<T | null, "@thilawyn/zod-schema-class/JsonifiedEffectOption">
-export type JsonifiedEffectOptionSome<T> = Opaque<T, "@thilawyn/zod-schema-class/JsonifiedEffectOptionSome">
-export type JsonifiedEffectOptionNone = Opaque<null, "@thilawyn/zod-schema-class/JsonifiedEffectOptionNone">
+export type JsonifiedEffectOptionSomeBrand = "@thilawyn/zod-schema-class/JsonifiedEffectOptionSome"
 
 
 export const jsonifyOption = {
@@ -31,7 +28,7 @@ export const jsonifyOption = {
     ) => schema
         .transform(v => Option.getOrThrow(v))
         .pipe(jsonifySchema(effectOptionSomeInnerSchema(schema)))
-        .brand<"@thilawyn/zod-schema-class/JsonifiedEffectOptionSome">(),
+        .brand<JsonifiedEffectOptionSomeBrand>(),
 
     none: <
         InnerS          extends z.ZodTypeAny,
@@ -45,32 +42,36 @@ export const jsonifyOption = {
 
 export const dejsonifyOption = {
     option: <
-        InnerS          extends z.ZodTypeAny,
-        JsonifiedInnerS extends z.ZodTypeAny = InnerS,
+        InnerS            extends z.ZodTypeAny,
+        DejsonifiedInnerS extends z.ZodTypeAny = InnerS,
     >(
-        schema:         ZodEffectOption<InnerS>,
-        jsonifySchema:  (schema: InnerS) => JsonifiedInnerS = identity,
+        schema:           ZodEffectOption<InnerS>,
+        dejsonifySchema:  (schema: InnerS) => DejsonifiedInnerS = identity,
     ) => z.union([
-        jsonifyOption.some(effectOptionSomeSchema(schema), jsonifySchema),
-        jsonifyOption.none(effectOptionNoneSchema(schema), jsonifySchema),
+        dejsonifyOption.some(effectOptionSomeSchema(schema), dejsonifySchema),
+        dejsonifyOption.none(effectOptionNoneSchema(schema), dejsonifySchema),
     ]),
 
     some: <
-        InnerS          extends z.ZodTypeAny,
-        JsonifiedInnerS extends z.ZodTypeAny = InnerS,
+        InnerS            extends z.ZodTypeAny,
+        DejsonifiedInnerS extends z.ZodTypeAny = InnerS,
     >(
-        schema:         ZodEffectOptionSome<InnerS>,
-        jsonifySchema:  (schema: InnerS) => JsonifiedInnerS = identity,
-    ) => schema
-        .transform(v => Option.getOrThrow(v))
-        .pipe(jsonifySchema(effectOptionSomeInnerSchema(schema))),
+        schema:           ZodEffectOptionSome<InnerS>,
+        dejsonifySchema:  (schema: InnerS) => DejsonifiedInnerS = identity,
+    ) => z
+        .custom<z.input<DejsonifiedInnerS> & z.BRAND<JsonifiedEffectOptionSomeBrand>>()
+        .pipe(dejsonifySchema(effectOptionSomeInnerSchema(schema)))
+        .transform(v => Option.some<z.output<DejsonifiedInnerS>>(v))
+        .pipe(schema),
 
     none: <
-        InnerS          extends z.ZodTypeAny,
-        JsonifiedInnerS extends z.ZodTypeAny = InnerS,
+        InnerS            extends z.ZodTypeAny,
+        DejsonifiedInnerS extends z.ZodTypeAny = InnerS,
     >(
-        schema:           ZodEffectOptionNone<InnerS>,
-        _jsonifySchema?:  (schema: InnerS) => JsonifiedInnerS,
-    ) =>
-        z.null().pipe(schema),
+        schema:             ZodEffectOptionNone<InnerS>,
+        _dejsonifySchema?:  (schema: InnerS) => DejsonifiedInnerS,
+    ) => z
+        .null()
+        .transform(() => Option.none<z.output<DejsonifiedInnerS>>())
+        .pipe(schema),
 } as const
diff --git a/src/tests.ts b/src/tests.ts
index 96a2559..d3c3023 100644
--- a/src/tests.ts
+++ b/src/tests.ts
@@ -2,7 +2,7 @@ import { Implements } from "@thilawyn/traitify-ts"
 import { Option } from "effect"
 import { z } from "zod"
 import { ZodSchemaClass } from "./ZodSchemaClass"
-import { dejsonify, jsonify } from "./schema/jsonified"
+import { jsonify } from "./schema/jsonified"
 import { jsonifyBigIntSchema } from "./schema/jsonified/bigint"
 import { effect } from "./schema/lib"
 import { MobXObservableZodSchemaObject } from "./traits/MobXObservableZodSchemaObject"
@@ -36,7 +36,6 @@ const jsonifiedBigIntOption = jsonify.option.option(
 )
 type T1 = z.output<typeof jsonifiedBigIntOption>
 
-
 const jsonifiedBigIntOptionSome = jsonify.option.some(
     effect.option.some(z.bigint()),
     jsonifyBigIntSchema,
@@ -50,10 +49,6 @@ const jsonifiedBigIntOptionNone = jsonify.option.none(
 type T3 = z.output<typeof jsonifiedBigIntOptionNone>
 
 
-const dejsonifyBigInt = dejsonify.bigint(z.bigint())
-type T4 = z.input<typeof dejsonifyBigInt>
-
-
 // const jsonifiedUserExp = JsonifiedZodSchemaClass(User, {
 //     jsonifySchema: s => s.extend({
 //         id: jsonify.bigint(s.shape.id)