diff --git a/Project.toml b/Project.toml
index bff5e93..d90b741 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Kezdi"
 uuid = "48308a23-c29e-446c-b4c0-d9446a767439"
 authors = ["Miklos Koren <miklos.koren@gmail.com>", "Gergely Attila Kiss <corra971407@gmail.com>"]
-version = "0.4.0"
+version = "0.4.1"
 
 [deps]
 CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"
diff --git a/docs/src/index.md b/docs/src/index.md
index 5f2bc90..911c48f 100644
--- a/docs/src/index.md
+++ b/docs/src/index.md
@@ -24,11 +24,14 @@ using Pkg; Pkg.add(url="https://github.com/codedthinking/Kezdi.jl")
 Every Kezdi.jl command is a macro that begins with `@`. These commands operate on a global `DataFrame` that is set using the `setdf` function. Alternatively, commands can be executed within a `@with` block that sets the `DataFrame` for the duration of the block.
 
 ### Example
-```julia
+```@setup mtcars
 using Kezdi
 using RDatasets
 
-setdf(dataset("datasets", "mtcars"))
+df = dataset("datasets", "mtcars")
+```
+```@repl mtcars
+setdf(df)
 
 @rename HP Horsepower
 @rename Disp Displacement
@@ -43,12 +46,7 @@ setdf(dataset("datasets", "mtcars"))
 ```
 
 Alternatively, you can use the `@with` block to avoid writing to a global `DataFrame`:
-```julia
-using Kezdi
-using RDatasets
-
-df = dataset("datasets", "mtcars")
-
+```@repl mtcars
 renamed_df = @with df begin
     @rename HP Horsepower
     @rename Disp Displacement
@@ -77,6 +75,8 @@ end
 | `@summarize` | 10.40s | 0.58s         | 0.37s         | 28x     |
 | `@regress`   | 0.89s | 1.93s         | 0.16s         | 6x      |
 
+See the benchmarking code for [Stata](https://github.com/codedthinking/Kezdi.jl/blob/main/examples/benchmark.do) and [Kezdi.jl](https://github.com/codedthinking/Kezdi.jl/blob/main/examples/benchmark.jl).
+
 ### Use any Julia function
 ```julia
 @generate logHP = log(Horsepower)