diff --git a/README.md b/README.md
index cbb6106f..8cc16e05 100644
--- a/README.md
+++ b/README.md
@@ -245,15 +245,6 @@ Command files should not have absolute filenames like
 These obviously are not portable. Use filenames relative to the test
 case directory.
 
-## Authors
-
-* James Cherry
-
-* William Scott authored the arnoldi delay calculator at Blaze, Inc
-  which was subsequently licensed to Nefelus, Inc that has graciously
-  contributed it to OpenSTA.
-
-
 ## Contributions
 
 Contributors must sign the Contributor License Agreement (doc/CLA.txt)
@@ -266,6 +257,17 @@ Contributions that claim 4% performance improvements in OpenROAD flow
 scripts will largely be ignored. Small performance improvements
 simply do not justify the time requied to audit and verify the changes.
 
+Contributions that add dependencies on external libraries like boost
+will not be accepted.
+
+## Authors
+
+* James Cherry
+
+* William Scott authored the arnoldi delay calculator at Blaze, Inc
+  which was subsequently licensed to Nefelus, Inc that has graciously
+  contributed it to OpenSTA.
+
 ## License
 
 OpenSTA, Static Timing Analyzer