diff --git a/exhaustive-search.md b/exhaustive-search.md
index 983318e06dd4d4c0fb4bf8257baff2f97bfc6eb2..3cacc9f88466e43b4517f6a38b25ad7a7ce4737a 100644
--- a/exhaustive-search.md
+++ b/exhaustive-search.md
@@ -16,7 +16,7 @@ Postcondition:
 
 (If `p` is a post, then `p.tags` gives its tags as a set of strings.)
 
-```
+```js
 function filter(posts, tag) {
   // …
 }
@@ -51,7 +51,7 @@ green, and blue.)
 
 (If `g` is a graph, then `g.vertices` gives its vertices as a set.)
 
-```
+```js
 function color(graph) {
   // …
   for (const coloring of mappings(graph.vertices, PALETTE)) {
@@ -85,7 +85,7 @@ of vertex pairs.)
 (The parameter `coloring` is assumed to hold a dictionary that maps
 vertices to colors.)
 
-```
+```js
 function isValidColoring(graph, coloring) {
   // …
 }
@@ -112,7 +112,7 @@ Sad path:
 
 ### JavaScript
 
-```
+```js
 function knapsack(items, getWeight, weightLimit, getValue) {
   // …
   for (const option of options(items, getWeight, weightLimit)) {
@@ -139,7 +139,7 @@ Postcondition:
 
 #### JavaScript
 
-```
+```js
 function options(items, getWeight, weightLimit) {
   // …
 }