diff --git a/courses/CSCI-4020.html b/courses/CSCI-4020.html
index f3cde7718..9763e2d07 100644
--- a/courses/CSCI-4020.html
+++ b/courses/CSCI-4020.html
@@ -46,9 +46,7 @@
             Prereqs:
           </div>
           <div id="prereq-classes" class="rel-info-courses">
-            <span class="none-rect">
-              none
-            </span>
+            <a class="course-pill" href="CSCI-2300">CSCI-2300 Introduction to Algorithms</a>
           </div>
         </div>
       </div>
diff --git a/courses/CSCI-4820.html b/courses/CSCI-4820.html
index 0073e503e..72568a392 100644
--- a/courses/CSCI-4820.html
+++ b/courses/CSCI-4820.html
@@ -54,9 +54,15 @@
             Prereqs:
           </div>
           <div id="prereq-classes" class="rel-info-courses">
-            <span class="none-rect">
-              none
-            </span>
+            <div class="pr-or-con">
+              <div class="pr-or-title">
+                one of:
+              </div>
+              <div class="pr-or">
+                <a class="course-pill" href="CSCI-4800">CSCI-4800 Numerical Computing</a>
+                <a class="course-pill" href="MATH-4800">MATH-4800 Numerical Computing</a>
+              </div>
+            </div>
           </div>
         </div>
       </div>
diff --git a/courses/CSCI-4960.html b/courses/CSCI-4960.html
index 0e84f3b82..eb68d1467 100644
--- a/courses/CSCI-4960.html
+++ b/courses/CSCI-4960.html
@@ -55,9 +55,7 @@
             Prereqs:
           </div>
           <div id="prereq-classes" class="rel-info-courses">
-            <span class="none-rect">
-              none
-            </span>
+            <a class="course-pill" href="CSCI-2300">CSCI-2300 Introduction to Algorithms</a>
           </div>
         </div>
       </div>