diff --git a/Main.hs b/Main.hs
--- a/Main.hs
+++ b/Main.hs
@@ -71,16 +71,16 @@
               "calculate interest until this date"
  , Option "D" ["daily"]
               (NoArg (\o -> o { optInterval = Just (Days 1) }))
-              "calculate intereste for each day"
+              "calculate interest for each day"
  , Option "W" ["weekly"]
               (NoArg (\o -> o { optInterval = Just (Weeks 1) }))
-              "calculate intereste for each week"
+              "calculate interest for each week"
  , Option "M" ["monthly"]
               (NoArg (\o -> o { optInterval = Just (Months 1) }))
-              "calculate intereste for each month"
+              "calculate interest for each month"
  , Option "Y" ["yearly"]
               (NoArg (\o -> o { optInterval = Just (Years 1) }))
-              "calculate intereste for each year"
+              "calculate interest for each year"
  ]
 
 usageMessage :: String
diff --git a/hledger-irr.cabal b/hledger-irr.cabal
--- a/hledger-irr.cabal
+++ b/hledger-irr.cabal
@@ -1,5 +1,5 @@
 Name:                   hledger-irr
-Version:                0.1.1
+Version:                0.1.1.1
 Synopsis:               computes the internal rate of return of an investment
 License:                BSD3
 License-file:           LICENSE
@@ -64,11 +64,11 @@
  > 2011/04/01: €-50.00
  > 2011/05/01: €47.00
  > 2011/06/01: €90.00
- > 2011/01/01 - 2013/05/02: 17.72%
+ > 2011/01/01 - 2013/05/14: 17.72%
  > $ hledger-irr -f speculation.ledger -t "Rate Gain" -i Speculation -e 2011-03-01
  > 2011/01/01 - 2011/03/01: 26.11%
  > $ hledger-irr -f speculation.ledger -t "Rate Gain" -i Speculation -b 2011-03-01
- > 2011/03/01 - 2013/05/02: 12.27%
+ > 2011/03/01 - 2013/05/14: 12.27%
  > $ hledger-irr -f speculation.ledger -t "Rate Gain" -i Speculation --monthly
  > 2011/01/01 - 2011/02/01: 12.43%
  > 2011/02/01 - 2011/03/01: 41.57%
@@ -89,10 +89,10 @@
  >   -t ACCOUNT  --interest-account=ACCOUNT    interest/gain/fees/losses account
  >   -b DATE     --begin=DATE                  calculate interest from this date
  >   -e DATE     --end=DATE                    calculate interest until this date
- >   -D          --daily                       calculate intereste for each day
- >   -W          --weekly                      calculate intereste for each week
- >   -M          --monthly                     calculate intereste for each month
- >   -Y          --yearly                      calculate intereste for each year
+ >   -D          --daily                       calculate interest for each day
+ >   -W          --weekly                      calculate interest for each week
+ >   -M          --monthly                     calculate interest for each month
+ >   -Y          --yearly                      calculate interest for each year
  .
  Known bugs and issues:
  .
@@ -104,7 +104,7 @@
 
 Executable hledger-irr
   Main-is:              Main.hs
-  Build-depends:        base >= 3 && < 5, hledger-lib == 0.20 || == 0.20.0.*, time, Cabal, statistics >= 0.10
+  Build-depends:        base >= 3 && < 5, hledger-lib == 0.20 || == 0.20.*, time, Cabal, statistics >= 0.10
   Ghc-Options:          -Wall
 
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