diff --git a/asn1-encoding.cabal b/asn1-encoding.cabal
--- a/asn1-encoding.cabal
+++ b/asn1-encoding.cabal
@@ -1,5 +1,5 @@
 Name:                asn1-encoding
-Version:             0.9.2
+Version:             0.9.3
 Synopsis:            ASN1 data reader and writer in RAW, BER and DER forms
 Description:
     ASN1 data reader and writer in raw form with supports for high level forms of ASN1 (BER, and DER).
@@ -29,7 +29,6 @@
                      Data.ASN1.Get
   Build-Depends:     base >= 3 && < 5
                    , bytestring
-                   , mtl
                    , hourglass >= 0.2.6
                    , asn1-types >= 0.3.0 && < 0.4
   ghc-options:       -Wall -fwarn-tabs