diff --git a/lab-topologies/aaa-tacacs-exploration/Snack_Minute_AAA_TACACS_Exploration.yaml b/lab-topologies/aaa-tacacs-exploration/Snack_Minute_AAA_TACACS_Exploration.yaml
index 0348c05..8b4ed9f 100644
--- a/lab-topologies/aaa-tacacs-exploration/Snack_Minute_AAA_TACACS_Exploration.yaml
+++ b/lab-topologies/aaa-tacacs-exploration/Snack_Minute_AAA_TACACS_Exploration.yaml
@@ -223,6 +223,7 @@ nodes:
             - flex
             - bison
             - libwrap0-dev
+            - libnsl-dev
 
           write_files:
             # Create the tac_plus configuration file
diff --git a/lab-topologies/aaa-tacacs-exploration/aaa-exploration-ios-nxos.yaml b/lab-topologies/aaa-tacacs-exploration/aaa-exploration-ios-nxos.yaml
index ad92062..0860fb9 100644
--- a/lab-topologies/aaa-tacacs-exploration/aaa-exploration-ios-nxos.yaml
+++ b/lab-topologies/aaa-tacacs-exploration/aaa-exploration-ios-nxos.yaml
@@ -499,6 +499,7 @@ nodes:
             - bison
             - libwrap0-dev
             - python3.10-venv
+            - libnsl-dev
 
           write_files:
             # Create the tac_plus configuration file