diff --git a/.github/workflows/build-release-docs.yaml b/.github/workflows/build-release-docs.yaml
index cf12fffa9..ed9d81b41 100644
--- a/.github/workflows/build-release-docs.yaml
+++ b/.github/workflows/build-release-docs.yaml
@@ -32,6 +32,7 @@ jobs:
 
       - name: Install Asciidoctor-PDF
         run: |
+          gem install public_suffix -v 5.1.1
           gem install asciidoctor-pdf
           asciidoctor-pdf --version
 
diff --git a/docs/LISF_installation_guide/LISF_installation_guide.adoc b/docs/LISF_installation_guide/LISF_installation_guide.adoc
index 07e28d7fa..6e64ca1db 100644
--- a/docs/LISF_installation_guide/LISF_installation_guide.adoc
+++ b/docs/LISF_installation_guide/LISF_installation_guide.adoc
@@ -1,6 +1,6 @@
 = LISF Installation Guide
-:revnumber: 2.0
-:revdate: 11 Jan 2024
+:revnumber: 2.1
+:revdate: 9 Jul 2024
 :doctype: book
 :sectnums:
 :toc:
diff --git a/docs/LISF_installation_guide/revision_table.adoc b/docs/LISF_installation_guide/revision_table.adoc
index 46934f422..2346daad4 100644
--- a/docs/LISF_installation_guide/revision_table.adoc
+++ b/docs/LISF_installation_guide/revision_table.adoc
@@ -2,6 +2,7 @@
 |====
 |Revision | Summary of Changes                         | Date
 
+|2.1      | LISF Public 7.5.1 release                  | Jul 9, 2024
 |2.0      | LISF Public 7.5.0 release                  | Jan 11, 2024
 |1.1      | LISF 557WW 7.5.0 release                   | Nov 30, 2022
 |1.0      | LISF Public 7.4.0 release                  | Jun 14, 2022