diff --git a/hakyll-bootstrap/Main.hs b/hakyll-bootstrap/Main.hs
index 5f087f813349977518d0e697ef2eb33b07b9dce7..4aec4b79b820a27fa070077a4b1d35916717f896 100644
--- a/hakyll-bootstrap/Main.hs
+++ b/hakyll-bootstrap/Main.hs
@@ -40,6 +40,11 @@ mathCtx = field "mathjax" $ \item -> do
            then "<script type=\"text/javascript\" src=\"https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js?config=TeX-AMS_HTML\"></script>"
            else ""
 
+courseCtx posts title =
+  listField "posts" postCtx (return posts)
+  `mappend` constField "title" title
+  `mappend` defaultContext
+            
 archiveCtx posts =
   listField "posts" postCtx (return posts)
   `mappend` constField "title" "Archives"
@@ -71,7 +76,7 @@ static = do
 
 resize :: Rules ()
 resize = do
-  match "img/thumbnails/**" $ do
+  match "img/thumbnails/**.png" $ do
       route idRoute
       compile $ loadImage
         >>= scaleImageCompiler 140 140
@@ -119,7 +124,7 @@ conc = do
     compile $ do
       posts <- recentFirst =<< loadAll "cours/*"
       makeItem ""
-        >>= loadAndApplyTemplate "templates/archive.html" (archiveCtx posts)
+        >>= loadAndApplyTemplate "templates/archive.html" (courseCtx posts "Programmation concurrente")
         >>= relativizeUrls
 
 index :: Rules ()
diff --git a/hakyll-bootstrap/templates/nav.html b/hakyll-bootstrap/templates/nav.html
index a1876f4ba8c7f388adddce38139601d51b1b27c5..34eaf19ebcef57a42679084942eff73c0ccedda3 100644
--- a/hakyll-bootstrap/templates/nav.html
+++ b/hakyll-bootstrap/templates/nav.html
@@ -19,7 +19,7 @@
               <ul class="dropdown-menu">
                 <li><a href="#">Mathématiques en technologie de l'information</a></li>
                 <li><a href="#">Programmation séquentielle en C</a></li>
-                <li><a href="#">Programmation concurrente</a></li>
+                <li><a href="/prog_conc.html">Programmation concurrente</a></li>
                 <li class="divider"></li>
                 <li class="dropdown-header">Archivés</li>
                 <li><a href="#">Sciences orientation logicielle</a></li>