diff --git a/diagrams-pgf.cabal b/diagrams-pgf.cabal
--- a/diagrams-pgf.cabal
+++ b/diagrams-pgf.cabal
@@ -1,5 +1,5 @@
 name:                diagrams-pgf
-version:             0.1.0.3
+version:             0.1.0.4
 synopsis:            PGF backend for diagrams drawing EDSL.
 license:             BSD3
 license-file:        LICENSE
@@ -32,7 +32,7 @@
     Graphics.Rendering.PGF
   hs-source-dirs:      src
   build-depends:
-    base                 >= 4.4   && < 4.9,
+    base                 >= 4.4   && < 4.10,
     bytestring           >= 0.9   && < 1.1,
     bytestring-builder               < 1.1,
     containers           >= 0.3   && < 0.6,
@@ -44,10 +44,10 @@
     hashable             >= 1.1   && < 1.3,
     mtl                  >= 2.1   && < 3.0,
     optparse-applicative >= 0.11  && < 0.13,
-    process              >= 1.0   && < 1.3,
+    process              >= 1.0   && < 1.5,
     split                >= 0.1.2 && < 0.3,
     texrunner            <= 0.0.2,
-    time                 >= 1.2   && < 1.6,
+    time                 >= 1.2   && < 1.7,
     JuicyPixels,
     vector,
     zlib
diff --git a/src/Graphics/Rendering/PGF.hs b/src/Graphics/Rendering/PGF.hs
--- a/src/Graphics/Rendering/PGF.hs
+++ b/src/Graphics/Rendering/PGF.hs
@@ -543,7 +543,7 @@
 
 -- | Sets the fill colour for current scope. If an alpha colour is used, the
 --   fill opacity is set accordingly. Must be done before filling.
-setFillColor :: (RealFloat n, Color c) => c -> Render n
+setFillColor :: Color c => c -> Render n
 setFillColor (colorToSRGBA -> (r,g,b,a)) = do
   defineColour "fc" r g b
   ln $ pgf "setfillcolor{fc}"