diff --git a/026_llvm.md b/026_llvm.md
index 40c53b9..3ba4873 100644
--- a/026_llvm.md
+++ b/026_llvm.md
@@ -750,7 +750,7 @@ ModRM = 0xc3
 
 **Scale Index Base**
 
-<img src="/images/Scale.png"></img>
+<img src="img/Scale.png"></img>
 
 Scale is the factor by which index is multipled before being added to base to
 specify the address of the operand. Scale can have value of 1, 2, 4, or
diff --git a/README.md b/README.md
index 62e6c95..c104ead 100644
--- a/README.md
+++ b/README.md
@@ -71,7 +71,7 @@ is done by the ``write-you-a-haskell.cabal`` and  ``stack.yaml`` files.
 $ stack exec make
 ```
 
-To make the generate the pdf, the LaTeX packages must be installed on the
+To generate the pdf, the LaTeX packages must be installed on the
 system.
 
 ```bash
@@ -81,6 +81,13 @@ $ sudo tlmgr install zapfding
 $ stack exec make pdf
 ```
 
+Generation of the epub is also supported.
+
+```bash
+$ stack exec make epub
+```
+
+
 **Cabal**
 
 ```bash
diff --git a/stack.yaml b/stack.yaml
index 2af92ac..e217d4b 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-2.22
+resolver: lts-4.2
 packages:
 - '.'
 extra-deps: []
diff --git a/write-you-a-haskell.cabal b/write-you-a-haskell.cabal
index 4e9f295..e05d712 100644
--- a/write-you-a-haskell.cabal
+++ b/write-you-a-haskell.cabal
@@ -11,7 +11,7 @@ cabal-version:       >=1.10
 executable write-you-a-haskell
   main-is:             Main.hs
   build-depends:       
-    base         >= 4.7 && <4.8,
+    base         >= 4.7 && <4.9,
     pretty       >= 1.1 && <1.2,
     containers   >= 0.5 && <0.6,
     transformers >= 0.3 && <0.5,