diff --git a/base64/decode/decode.node.ts b/base64/decode/decode.node.ts
index 47c3674dc45..62a8a15f504 100644
--- a/base64/decode/decode.node.ts
+++ b/base64/decode/decode.node.ts
@@ -1,5 +1,5 @@
 namespace $ {
-	export function $mol_base64_decode_node(base64Str: string): Uint8Array {
+	export function $mol_base64_decode_node(base64Str: string): Uint8Array< ArrayBuffer > {
 		
 		base64Str = base64Str.replace( /-/g, '+' ).replace( /_/g, '/' )
 		
diff --git a/base64/decode/decode.ts b/base64/decode/decode.ts
index 761eec23994..0ac9c15c99d 100644
--- a/base64/decode/decode.ts
+++ b/base64/decode/decode.ts
@@ -1,5 +1,5 @@
 namespace $ {
-	export function $mol_base64_decode(base64: string): Uint8Array {
+	export function $mol_base64_decode(base64: string): Uint8Array< ArrayBuffer > {
 		throw new Error('Not implemented')
 	}
 }
diff --git a/base64/decode/decode.web.ts b/base64/decode/decode.web.ts
index 30d5f9baf11..b895b3da682 100644
--- a/base64/decode/decode.web.ts
+++ b/base64/decode/decode.web.ts
@@ -1,6 +1,6 @@
 namespace $ {
 
-	export function $mol_base64_decode_web(base64Str: string): Uint8Array {
+	export function $mol_base64_decode_web(base64Str: string): Uint8Array< ArrayBuffer > {
 		return new Uint8Array($mol_dom_context.atob(base64Str).split('').map(c => c.charCodeAt(0)))
 	}
 
diff --git a/buffer/buffer.ts b/buffer/buffer.ts
index 4151c5d830c..86e01f70433 100644
--- a/buffer/buffer.ts
+++ b/buffer/buffer.ts
@@ -1,11 +1,11 @@
 namespace $ {
-	export class $mol_buffer extends DataView {
+	export class $mol_buffer extends DataView< ArrayBuffer > {
 		
 		static from<
 			This extends typeof $mol_buffer
 		>(
 			this: This,
-			array: number | string | ArrayBufferView,
+			array: number | string | ArrayBufferView< ArrayBuffer >,
 		) {
 			if( typeof array === 'number' ) array = new Uint8Array( array )
 			if( typeof array === 'string' ) array = $mol_base64_ae_decode( array )
diff --git a/crypto/key/key.ts b/crypto/key/key.ts
index 4a0f8aa0a40..74c651ffef0 100644
--- a/crypto/key/key.ts
+++ b/crypto/key/key.ts
@@ -8,14 +8,14 @@ namespace $ {
 	
 	export class $mol_crypto_key extends $mol_buffer {
 		
-		static from< This extends typeof $mol_crypto_key >( this: This, serial: number | string | ArrayBufferView ) {
+		static from< This extends typeof $mol_crypto_key >( this: This, serial: number | string | ArrayBufferView< ArrayBuffer > ) {
 			
 			if( typeof serial === 'string' ) {
 				serial = new Uint8Array([
 					... $mol_base64_url_decode( serial.slice( 0, 43 ) ),
 					... $mol_base64_url_decode( serial.slice( 43, 86 ) ),
 					... $mol_base64_url_decode( serial.slice( 86, 129 ) ),
-				])
+				]) as Uint8Array< ArrayBuffer >
 			}
 			
 			return super.from( serial ) as InstanceType< This >