diff --git a/cblrepo.cabal b/cblrepo.cabal
--- a/cblrepo.cabal
+++ b/cblrepo.cabal
@@ -1,5 +1,5 @@
 name: cblrepo
-version: 0.18.0
+version: 0.18.1
 cabal-version: >= 1.6
 license: OtherLicense
 license-file: LICENSE-2.0
@@ -31,7 +31,7 @@
         process ==1.2.*, Unixutils ==1.54.*, unix ==2.7.*,
         ansi-wl-pprint ==0.6.*, aeson ==0.9.*, stringsearch ==0.3.*,
         optparse-applicative ==0.11.*, safe ==0.3.*, containers ==0.5.*,
-        utf8-string ==1
+        utf8-string ==1.0.*
 
 Source-Repository head
     Type:                 git
diff --git a/src/Util/HackageIndex.hs b/src/Util/HackageIndex.hs
--- a/src/Util/HackageIndex.hs
+++ b/src/Util/HackageIndex.hs
@@ -39,7 +39,7 @@
 
 readIndexFile :: FilePath -> FilePath -> IO BSL.ByteString
 readIndexFile indexLocation indexFilename = exitOnException
-    "Cannot open index file, have you run the 'sync' command?"
+    "Cannot open index file, have you run the 'update' command?"
     (BSL.readFile $ indexLocation </> indexFilename)
 
 type PkgVersions = M.Map String [(Version, Int)]