diff --git a/README.md b/README.md
index cf310e01a..3c107f0b8 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ The latest development version of mruby can be downloaded via the following URL:
 The trunk of the mruby source tree can be checked out with the
 following command:
 
-```
+```console
 $ git clone https://github.com/mruby/mruby.git
 ```
 
@@ -45,7 +45,7 @@ We don't have a mailing list, but you can use [GitHub issues](https://github.com
 
 For the simplest case, type
 
-```
+```console
 rake all test
 ```
 
@@ -57,13 +57,13 @@ There are two sets of documentation in mruby: the mruby API (generated by yard)
 
 To build both of them, simply go
 
-```
+```console
 rake doc
 ```
 
 You can also view them in your browser
 
-```
+```console
 rake view_api
 rake view_capi
 ```
diff --git a/doc/guides/compile.md b/doc/guides/compile.md
index 08dedbf9d..68fcef50b 100644
--- a/doc/guides/compile.md
+++ b/doc/guides/compile.md
@@ -527,7 +527,7 @@ After the build, you will get `libmruby.a`. You can link it to your application.
 For compiler options and library path, you can use `mruby-config` command for
 convenience. `mruby-config` command prints the configuration used for `libmruby.a`.
 
-```
+```console
 $ mruby-config --help
 Usage: mruby-config [switches]
   switches:
diff --git a/doc/guides/link.md b/doc/guides/link.md
index 861f71365..491efc413 100644
--- a/doc/guides/link.md
+++ b/doc/guides/link.md
@@ -54,7 +54,7 @@ command with following options:
 - `--cc`                    compiler name
 - `--cflags`                options passed to compiler
 
-```
+```console
 $ mruby-config --cflags
 -std=gnu99 -g -O3 -Wall -DMRB_GC_FIXED_ARENA -I/home/matz/work/mruby/include -I/home/matz/work/mruby/build/host/include
 ```
@@ -71,7 +71,7 @@ To retrieve linker options, you can use `mruby-config` with following options:
 - `--ldflags-before-libs`   options passed to linker before linked libraries
 - `--libs`                  linked libraries
 
-```
+```console
 $ mruby-config --ldflags
 -L/home/matz/work/mruby/build/host/lib