diff --git a/misc/core.func b/misc/core.func
index 0fdd2c58..fab61050 100644
--- a/misc/core.func
+++ b/misc/core.func
@@ -272,7 +272,7 @@ root_check() {
 # pve_check()
 #
 # - Validates Proxmox VE version compatibility
-# - Supported: PVE 8.0-8.9 and PVE 9.0 only
+# - Supported: PVE 8.0-8.9 and PVE 9.0-9.1
 # - Exits with error message if unsupported version detected
 # ------------------------------------------------------------------------------
 pve_check() {
@@ -290,12 +290,12 @@ pve_check() {
     return 0
   fi
 
-  # Check for Proxmox VE 9.x: allow ONLY 9.0
+  # Check for Proxmox VE 9.x: allow 9.0–9.1
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR != 0)); then
+    if ((MINOR < 0 || MINOR > 1)); then
       msg_error "This version of Proxmox VE is not yet supported."
-      msg_error "Supported: Proxmox VE version 9.0"
+      msg_error "Supported: Proxmox VE version 9.0 – 9.1"
       exit 1
     fi
     return 0
@@ -303,7 +303,7 @@ pve_check() {
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.9 or 9.0 – 9.1"
   exit 1
 }
 
diff --git a/vm/nextcloud-vm.sh b/vm/nextcloud-vm.sh
index d6710259..5fe6489b 100644
--- a/vm/nextcloud-vm.sh
+++ b/vm/nextcloud-vm.sh
@@ -118,9 +118,9 @@ function check_root() {
 }
 
 function pve_check() {
-  if ! pveversion | grep -Eq "pve-manager/8\.[1-4](\.[0-9]+)*"; then
+  if ! pveversion | grep -Eq "pve-manager/(8\.[1-4]|9\.[0-1])(\.[0-9]+)*"; then
     msg_error "This version of Proxmox Virtual Environment is not supported"
-    echo -e "Requires Proxmox Virtual Environment Version 8.1 or later."
+    echo -e "Requires Proxmox Virtual Environment Version 8.1 - 8.4 or 9.0 - 9.1."
     echo -e "Exiting..."
     sleep 2
     exit
diff --git a/vm/openwrt.sh b/vm/openwrt.sh
index 86f6e4e4..8070ca6f 100644
--- a/vm/openwrt.sh
+++ b/vm/openwrt.sh
@@ -185,9 +185,9 @@ function msg_error() {
 }
 
 function pve_check() {
-  if ! pveversion | grep -Eq "pve-manager/8\.[1-4](\.[0-9]+)*"; then
+  if ! pveversion | grep -Eq "pve-manager/(8\.[1-4]|9\.[0-1])(\.[0-9]+)*"; then
     msg_error "This version of Proxmox Virtual Environment is not supported"
-    echo -e "Requires Proxmox Virtual Environment Version 8.1 or later."
+    echo -e "Requires Proxmox Virtual Environment Version 8.1 - 8.4 or 9.0 - 9.1."
     echo -e "Exiting..."
     sleep 2
     exit
diff --git a/vm/opnsense-vm.sh b/vm/opnsense-vm.sh
index ff2c2aac..212f79f3 100644
--- a/vm/opnsense-vm.sh
+++ b/vm/opnsense-vm.sh
@@ -181,9 +181,9 @@ function msg_error() {
 }
 
 function pve_check() {
-  if ! pveversion | grep -Eq "pve-manager/8\.[1-4](\.[0-9]+)*"; then
+  if ! pveversion | grep -Eq "pve-manager/(8\.[1-4]|9\.[0-1])(\.[0-9]+)*"; then
     msg_error "This version of Proxmox Virtual Environment is not supported"
-    echo -e "Requires Proxmox Virtual Environment Version 8.1 or later."
+    echo -e "Requires Proxmox Virtual Environment Version 8.1 - 8.4 or 9.0 - 9.1."
     echo -e "Exiting..."
     sleep 2
     exit
diff --git a/vm/owncloud-vm.sh b/vm/owncloud-vm.sh
index 5b6c186e..91cc7303 100644
--- a/vm/owncloud-vm.sh
+++ b/vm/owncloud-vm.sh
@@ -119,9 +119,9 @@ function check_root() {
 }
 
 function pve_check() {
-  if ! pveversion | grep -Eq "pve-manager/8\.[1-4](\.[0-9]+)*"; then
+  if ! pveversion | grep -Eq "pve-manager/(8\.[1-4]|9\.[0-1])(\.[0-9]+)*"; then
     msg_error "This version of Proxmox Virtual Environment is not supported"
-    echo -e "Requires Proxmox Virtual Environment Version 8.1 or later."
+    echo -e "Requires Proxmox Virtual Environment Version 8.1 - 8.4 or 9.0 - 9.1."
     echo -e "Exiting..."
     sleep 2
     exit
diff --git a/vm/ubuntu2204-vm.sh b/vm/ubuntu2204-vm.sh
index a662efb3..1b58eae9 100644
--- a/vm/ubuntu2204-vm.sh
+++ b/vm/ubuntu2204-vm.sh
@@ -135,9 +135,9 @@ function check_root() {
 }
 
 function pve_check() {
-  if ! pveversion | grep -Eq "pve-manager/8\.[1-4](\.[0-9]+)*"; then
+  if ! pveversion | grep -Eq "pve-manager/(8\.[1-4]|9\.[0-1])(\.[0-9]+)*"; then
     msg_error "${CROSS}${RD}This version of Proxmox Virtual Environment is not supported"
-    echo -e "Requires Proxmox Virtual Environment Version 8.1 or later."
+    echo -e "Requires Proxmox Virtual Environment Version 8.1 - 8.4 or 9.0 - 9.1."
     echo -e "Exiting..."
     sleep 2
     exit
diff --git a/vm/ubuntu2404-vm.sh b/vm/ubuntu2404-vm.sh
index 28f1f4e2..33221846 100644
--- a/vm/ubuntu2404-vm.sh
+++ b/vm/ubuntu2404-vm.sh
@@ -138,9 +138,9 @@ function check_root() {
 }
 
 function pve_check() {
-  if ! pveversion | grep -Eq "pve-manager/8\.[1-4](\.[0-9]+)*"; then
+  if ! pveversion | grep -Eq "pve-manager/(8\.[1-4]|9\.[0-1])(\.[0-9]+)*"; then
     msg_error "${CROSS}${RD}This version of Proxmox Virtual Environment is not supported"
-    echo -e "Requires Proxmox Virtual Environment Version 8.1 or later."
+    echo -e "Requires Proxmox Virtual Environment Version 8.1 - 8.4 or 9.0 - 9.1."
     echo -e "Exiting..."
     sleep 2
     exit
diff --git a/vm/ubuntu2410-vm.sh b/vm/ubuntu2410-vm.sh
index 82d8519c..bd6e6d88 100644
--- a/vm/ubuntu2410-vm.sh
+++ b/vm/ubuntu2410-vm.sh
@@ -138,9 +138,9 @@ function check_root() {
 }
 
 function pve_check() {
-  if ! pveversion | grep -Eq "pve-manager/8\.[1-4](\.[0-9]+)*"; then
+  if ! pveversion | grep -Eq "pve-manager/(8\.[1-4]|9\.[0-1])(\.[0-9]+)*"; then
     msg_error "${CROSS}${RD}This version of Proxmox Virtual Environment is not supported"
-    echo -e "Requires Proxmox Virtual Environment Version 8.1 or later."
+    echo -e "Requires Proxmox Virtual Environment Version 8.1 - 8.4 or 9.0 - 9.1."
     echo -e "Exiting..."
     sleep 2
     exit
diff --git a/vm/umbrel-os-vm.sh b/vm/umbrel-os-vm.sh
index 0e238d6e..daed9702 100644
--- a/vm/umbrel-os-vm.sh
+++ b/vm/umbrel-os-vm.sh
@@ -130,9 +130,9 @@ function check_root() {
 }
 
 function pve_check() {
-  if ! pveversion | grep -Eq "pve-manager/8\.[1-4](\.[0-9]+)*"; then
+  if ! pveversion | grep -Eq "pve-manager/(8\.[1-4]|9\.[0-1])(\.[0-9]+)*"; then
     msg_error "${CROSS}${RD}This version of Proxmox Virtual Environment is not supported"
-    echo -e "Requires Proxmox Virtual Environment Version 8.1 or later."
+    echo -e "Requires Proxmox Virtual Environment Version 8.1 - 8.4 or 9.0 - 9.1."
     echo -e "Exiting..."
     sleep 2
     exit
diff --git a/vm/unifi-os-vm.sh b/vm/unifi-os-vm.sh
index cd5b6413..1a7233a6 100644
--- a/vm/unifi-os-vm.sh
+++ b/vm/unifi-os-vm.sh
@@ -147,7 +147,7 @@ function check_root() {
 }
 
 # This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
-# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 – 9.1
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
@@ -163,12 +163,12 @@ pve_check() {
     return 0
   fi
 
-  # Check for Proxmox VE 9.x: allow ONLY 9.0
+  # Check for Proxmox VE 9.x: allow 9.0–9.1
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR != 0)); then
+    if ((MINOR < 0 || MINOR > 1)); then
       msg_error "This version of Proxmox VE is not yet supported."
-      msg_error "Supported: Proxmox VE version 9.0"
+      msg_error "Supported: Proxmox VE version 9.0 – 9.1"
       exit 1
     fi
     return 0