diff --git a/_web_server/server/playground-server.scm b/_web_server/server/playground-server.scm
index 88c4afd..5cb2d49 100755
--- a/_web_server/server/playground-server.scm
+++ b/_web_server/server/playground-server.scm
@@ -827,9 +827,8 @@
                   "Rules:"
                   "0. Don't fool around ;)"
                   "1. The top module must be named 'testbench'."
-                  "2. The top module must have an input clock signal."
-                  "3. Code size should not exceed 10000 characters."
-                  "4. Code execution time no longer than 5 seconds.")
+                  "2. Code size should not exceed 10000 characters."
+                  "3. Code execution time no longer than 5 seconds.")
                 "\\n"))))))
          (iverilog-metatop
           (call-with-input-file IVERILOG-METATOP-FILE get-string-all))