diff --git a/hledger/Hledger/Cli/Commands/Roi.hs b/hledger/Hledger/Cli/Commands/Roi.hs
index 8266400d6..1ca1c53c6 100644
--- a/hledger/Hledger/Cli/Commands/Roi.hs
+++ b/hledger/Hledger/Cli/Commands/Roi.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE QuasiQuotes,ParallelListComp #-}
+{-# LANGUAGE QuasiQuotes,ParallelListComp,CPP #-}
 {-|
 
 The @roi@ command prints internal rate of return and time-weighted rate of return for and investment.
@@ -17,7 +17,7 @@ import Text.Printf
 import Data.Function (on)
 import Data.List
 import Data.Ord
-import Statistics.Math.RootFinding
+import Numeric.RootFinding
 import Data.Decimal
 import Data.String.Here
 import System.Console.CmdArgs.Explicit as CmdArgs
@@ -216,7 +216,13 @@ internalRateOfReturn showCashFlow prettyTables (OneSpan spanBegin spanEnd valueB
        (map ((:[]) . show) amounts))
                              
   -- 0% is always a solution, so require at least something here
-  case ridders 0.00001 (0.000000000001,10000) (interestSum spanEnd totalCF) of
+  case ridders 
+#if MIN_VERSION_math_functions(0,3,0)
+    (RiddersParam 100 (AbsTol 0.00001)) 
+#else
+    0.00001
+#endif
+    (0.000000000001,10000) (interestSum spanEnd totalCF) of
     Root rate -> return ((rate-1)*100)
     NotBracketed -> error "Error: No solution -- not bracketed."
     SearchFailed -> error "Error: Failed to find solution."
diff --git a/hledger/hledger.cabal b/hledger/hledger.cabal
index 17310eec8..34e9dfa3e 100644
--- a/hledger/hledger.cabal
+++ b/hledger/hledger.cabal
@@ -4,7 +4,7 @@ cabal-version: 1.12
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 459ec44c2ae4fd1a0f7e0f8001c3efae2a39ff8b1ef53baa0a510b0674e98c2c
+-- hash: 38ae7b05855ed1a89093bf46334c3ccd5d3e992499741befae04883a34da86b0
 
 name:           hledger
 version:        1.12
@@ -132,6 +132,7 @@ library
     , here
     , hledger-lib >=1.12 && <1.13
     , lucid
+    , math-functions >=0.2.0.0
     , megaparsec >=7.0.0 && <8
     , mtl
     , mtl-compat
@@ -143,7 +144,6 @@ library
     , safe >=0.2
     , shakespeare >=2.0.2.2
     , split >=0.1
-    , statistics <=0.15
     , tabular >=0.2
     , temporary
     , text >=0.11
@@ -183,6 +183,7 @@ executable hledger
     , here
     , hledger
     , hledger-lib >=1.12 && <1.13
+    , math-functions >=0.2.0.0
     , megaparsec >=7.0.0 && <8
     , mtl
     , mtl-compat
@@ -194,7 +195,6 @@ executable hledger
     , safe >=0.2
     , shakespeare >=2.0.2.2
     , split >=0.1
-    , statistics <=0.15
     , tabular >=0.2
     , temporary
     , text >=0.11
@@ -237,6 +237,7 @@ test-suite test
     , here
     , hledger
     , hledger-lib >=1.12 && <1.13
+    , math-functions >=0.2.0.0
     , megaparsec >=7.0.0 && <8
     , mtl
     , mtl-compat
@@ -248,7 +249,6 @@ test-suite test
     , safe >=0.2
     , shakespeare >=2.0.2.2
     , split >=0.1
-    , statistics <=0.15
     , tabular >=0.2
     , temporary
     , test-framework
@@ -292,6 +292,7 @@ benchmark bench
     , hledger
     , hledger-lib >=1.12 && <1.13
     , html
+    , math-functions >=0.2.0.0
     , megaparsec >=7.0.0 && <8
     , mtl
     , mtl-compat
@@ -303,7 +304,6 @@ benchmark bench
     , safe >=0.2
     , shakespeare >=2.0.2.2
     , split >=0.1
-    , statistics <=0.15
     , tabular >=0.2
     , temporary
     , text >=0.11
diff --git a/hledger/package.yaml b/hledger/package.yaml
index 156671600..285fd6c4f 100644
--- a/hledger/package.yaml
+++ b/hledger/package.yaml
@@ -104,7 +104,7 @@ dependencies:
 - safe >=0.2
 - shakespeare >=2.0.2.2
 - split >=0.1
-- statistics <=0.15
+- math-functions >=0.2.0.0
 - tabular >=0.2
 - temporary
 - text >=0.11
diff --git a/stack-ghc7.10.yaml b/stack-ghc7.10.yaml
index 5e24a3363..c6d42ddbc 100644
--- a/stack-ghc7.10.yaml
+++ b/stack-ghc7.10.yaml
@@ -45,6 +45,7 @@ extra-deps:
 - integer-logarithms-1.0.2.1
 - kan-extensions-5.1
 - lens-4.16.1
+- math-functions-0.2.1.0
 - megaparsec-7.0.1
 - microstache-1.0.1.1
 - mmorph-1.1.2
diff --git a/stack.yaml b/stack.yaml
index b177546a6..51ee4ed75 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -24,7 +24,6 @@ extra-deps:
 
 # hledger
 - control-monad-free-0.6.2
-- statistics-0.14.0.2
 - timeit-2.0
 - wizards-1.0.3