diff --git a/README.md b/README.md
index 306f5a7848fc23203f13b552982a4133e9b1fb62..e7c5cccb8ed93c71183fa42f83110ad7cec78249 100644
--- a/README.md
+++ b/README.md
@@ -12,8 +12,8 @@ Type `opam install fix`.
 At the top of an OCaml module, declare `open Fix`.
 This gives you access to the following submodules:
 
-* [`CompactQueue`](src/CompactQueue.mli) offers a minimalist mutable
-  FIFO queue that is tuned for performance.
+* [`CompactQueue`](src/CompactQueue.mli) offers **a minimalist mutable
+  FIFO queue** that is tuned for performance.
 
 * [`DataFlow`](src/DataFlow.mli) performs a forward data flow analysis
   over a directed graph. Like [`Fix`](src/Core.mli), it computes the
@@ -25,8 +25,8 @@ This gives you access to the following submodules:
 * [`Gensym`](src/Gensym.mli) offers a simple facility
   for **generating fresh integer identifiers**.
 
-* [`Indexing`](src/Indexing.mli) offers a safe API for manipulating indices
-  into fixed-size arrays.
+* [`Indexing`](src/Indexing.mli) offers **a safe API for manipulating indices
+  into fixed-size arrays**.
 
 * [`Memoize`](src/Memoize.mli) offers a number of combinators
   that help **construct possibly recursive memoizing functions**, that