diff --git a/doc/install.txt b/doc/install.txt
index fd7e9c91..2e9a57ba 100644
--- a/doc/install.txt
+++ b/doc/install.txt
@@ -27,13 +27,13 @@ are slightly different. Please consult developers.txt in this directory.
     * III. Download the VIVO Application Source
     * IV. Specify deployment properties
     * V. Compile and deploy
-    * VI. Set Tomcat JVM Parameters
+    * VI. Set Tomcat JVM parameters and security limits
     * VII. Start Tomcat
     * VIII. Log in and add RDF data
     * IX. Set the Contact Email Address (if using "Contact Us" form)
     * X. Setup Apache Tomcat Connector
     * XI. Configure Pellet Reasoner
-    * XII. Was the Installation Successful?
+    * XII. Was the installation successful?
 
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@@ -169,7 +169,7 @@ to build VIVO and deploy to Tomcat's webapps directory.
 
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-VI. Set Tomcat JVM Parameters
+VI. Set Tomcat JVM parameters and security limits
 
 Currently, VIVO copies the contents of your RDF database into memory in order
 to serve Web requests quickly (the in-memory copy and the underlying database
@@ -192,6 +192,14 @@ sets of data, 256m to 512m should be sufficient.
 If an OutOfMemoryError is encountered during VIVO execution, it can be remedied 
 by increasing the heap parameters and restarting Tomcat.
 
+Security limits: VIVO is a multithreaded web application that may require more threads than are 
+permitted under your Linux installation's default configuration. Ensure that 
+your installation can support the required number of threads by making the 
+following edits to /etc/security/limits.conf:
+
+    apache    hard    nproc   400
+    tomcat6   hard    nproc   1500 
+
 -------------------------------------------------------------------------------
  
 VII. Start Tomcat