diff --git a/docs/libs.rst b/docs/libs.rst
index ee3c536c..9d71963f 100644
--- a/docs/libs.rst
+++ b/docs/libs.rst
@@ -55,20 +55,20 @@ Explicit renaming macro family.
 (picrin regexp)
 ---------------
 
-- *(regexp ptrn [flags])*
+- **(regexp ptrn [flags])**
 
   Compiles pattern string into a regexp object. A string flags may contain any of #\g, #\i, #\m.
 
-- *(regexp? obj)*
+- **(regexp? obj)**
 
   Judges if obj is a regexp object or not.
 
-- *(regexp-match re input)*
+- **(regexp-match re input)**
 
   Returns two values: a list of match strings, and a list of match indeces.
 
-- *(regexp-replace re input txt)*
-- *(regexp-split re input)*
+- **(regexp-replace re input txt)**
+- **(regexp-split re input)**
 
 
 (picrin control)
@@ -76,8 +76,8 @@ Explicit renaming macro family.
 
 Delimited control operators.
 
-- *(reset h)*
-- *(shift k)*
+- **(reset h)**
+- **(shift k)**
 
 
 (picrin dictionary)
@@ -87,27 +87,27 @@ Symbol to Object table. Internally it is implemented on hash-table.
 
 Note that dictionary is not a weak map; if you are going to make a highly memory-consuming program with dictionaries, you should know that dictionaries keep their bound objects and never let them free until you explicitly deletes bindings.
 
-- *(dictionary)*
+- **(dictionary)**
 
   Returns a newly allocated empty dictionary. In the future, it is planned to extend this function to take optional arguments for initial key/values.
 
-- *(dictionary? obj)*
+- **(dictionary? obj)**
 
   Returns #t if obj is a dictionary.
 
-- *(dictionary-ref dict key)*
+- **(dictionary-ref dict key)**
 
   Look up dictionary dict for a value associated with symbol key. If no object is associated with key, it will raise an error.
 
-- *(dictionary-set! dict key obj)*
+- **(dictionary-set! dict key obj)**
 
   If there is no value already associated with key, this function newly creates a binding of key with obj. Otherwise, updates the existing binding with given obj.
 
-- *(dictionary-delete dict key)*
+- **(dictionary-delete dict key)**
 
   Deletes the binding associated with key from dict. If no binding on dict is associated with key, an error will be raised.
 
-- *(dictionary-size dict)*
+- **(dictionary-size dict)**
 
   Returns the number of registered elements in dict.