diff --git a/GeminiProtocol.hs b/GeminiProtocol.hs
--- a/GeminiProtocol.hs
+++ b/GeminiProtocol.hs
@@ -8,6 +8,7 @@
 -- You should have received a copy of the GNU General Public License
 -- along with this program.  If not, see http://www.gnu.org/licenses/.
 
+{-# LANGUAGE CPP               #-}
 {-# LANGUAGE LambdaCase        #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TupleSections     #-}
@@ -66,7 +67,9 @@
 import           URI
 import           Util
 
+#ifdef DRUNKEN_BISHOP
 import           Data.Digest.DrunkenBishop
+#endif
 
 defaultGeminiPort :: Int
 defaultGeminiPort = 1965
@@ -437,6 +440,7 @@
                     hex = ("0123456789abcdef" !!) . fromIntegral
                 in hex a : hex b : ""
     fingerprintPicture :: Fingerprint -> [String]
+#ifdef DRUNKEN_BISHOP
     fingerprintPicture (Fingerprint fp) = boxedDrunkenBishop fp where
         boxedDrunkenBishop :: BS.ByteString -> [String]
         boxedDrunkenBishop s = ["+-----[X509]------+"]
@@ -445,6 +449,9 @@
         drunkenBishopPreHashed :: BS.ByteString -> String
         drunkenBishopPreHashed = drunkenBishopWithOptions $
             drunkenBishopDefaultOptions { drunkenBishopHash = id }
+#else
+    fingerprintPicture _ = []
+#endif
 
     -- |those ciphers from ciphersuite_default fitting the requirements
     -- recommended by the gemini "best practices" document:
diff --git a/Makefile b/Makefile
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-VERSION=0.1.14.1
+VERSION=0.1.14.2
 
 GHCOPTS=-threaded -DICONV -DMAGIC -ignore-package regex-compat-tdfa
 
diff --git a/Version.hs b/Version.hs
--- a/Version.hs
+++ b/Version.hs
@@ -16,4 +16,4 @@
 programName = "diohsc"
 
 version :: String
-version = "0.1.14.1"
+version = "0.1.14.2"
diff --git a/diohsc.cabal b/diohsc.cabal
--- a/diohsc.cabal
+++ b/diohsc.cabal
@@ -1,6 +1,6 @@
 cabal-version:      1.18
 name:               diohsc
-version:            0.1.14.1
+version:            0.1.14.2
 license:            GPL-3
 license-file:       COPYING
 maintainer:         mbays@sdf.org
@@ -27,7 +27,11 @@
 flag libiconv
     description:
         Use libiconv for charset conversion
+    default:     True
 
+flag drunken-bishop
+    description:
+        Show ascii art pictures of server certificates
     default:     True
 
 flag magic
@@ -39,7 +43,6 @@
     description:
         Allow IRIs in gemtext links (preparing for likely spec change).
         Punycoding is not currently supported.
-
     default:     False
     manual:      True
 
@@ -88,13 +91,12 @@
         base >=4.3 && <5,
         asn1-encoding <0.10,
         asn1-types >=0.3.4 && <0.4,
-        bytestring >=0.10.4.0 && <0.12,
+        bytestring >=0.10.4.0 && <0.13,
         containers >=0.5.5.1 && <0.7,
         cryptonite >=0.26 && <0.31,
         data-default-class >=0.1.2.0 && <0.2,
         hashable >= 1.1 && <1.5,
         directory >=1.2.1.0 && <1.4,
-        drunken-bishop >=0.1.0.0 && <0.2,
         exceptions >=0.10.4 && <0.11,
         filepath >=1.3.0.2 && <1.5,
         haskeline ==0.8.*,
@@ -136,3 +138,7 @@
     if flag(libiconv)
         cpp-options:   -DICONV
         build-depends: iconv >=0.4.1.3 && <0.5
+
+    if flag(drunken-bishop)
+        cpp-options:   -DDRUNKEN_BISHOP
+        build-depends: drunken-bishop >=0.1.0.0 && <0.2