diff --git a/package.json b/package.json
index f7cabdd0..7ff4e118 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "defguard-client",
   "private": false,
-  "version": "1.6.3",
+  "version": "1.6.4",
   "type": "module",
   "scripts": {
     "dev": "npm-run-all --parallel vite typesafe-i18n",
diff --git a/resources-linux/postinst b/resources-linux/postinst
index 64779ffd..1dac4b2b 100644
--- a/resources-linux/postinst
+++ b/resources-linux/postinst
@@ -4,21 +4,43 @@ set -e
 GROUP_NAME="defguard"
 SERVICE_NAME="defguard-service"
 
+# Get the name of user who is installing the client
+get_installing_user() {
+    # Method 1: Check standard environment variables when installing with CLI
+    if [ -n "$SUDO_USER" ] && [ "$SUDO_USER" != "root" ]; then
+        INSTALLING_USER="$SUDO_USER"
+    elif [ -n "$USER" ] && [ "$USER" != "root" ]; then
+        INSTALLING_USER="$USER"
+    fi
+    if [ -n "$INSTALLING_USER" ]; then
+        echo "$INSTALLING_USER"
+        return 0
+    fi
+
+    # Method 2: Check loginctl for latest session
+    SESSION_ID=$(loginctl show-seat seat0 -p ActiveSession --value)
+    username=$(loginctl show-session "$SESSION_ID" -p Name --value)
+    if [ -n "$username" ]; then
+        echo "$username"
+        return 0
+    fi
+    
+    return 1
+}
+
 case "$1" in
     1|configure)
         # Create the group if it doesn't exist
         if ! getent group "$GROUP_NAME" >/dev/null; then
             groupadd --system "$GROUP_NAME"
             echo "Created group $GROUP_NAME"
+        else
+            echo "Group $GROUP_NAME exists already."
         fi
 
         # Determine target user
-        TARGET_USER=""
-        if [ -n "$SUDO_USER" ] && [ "$SUDO_USER" != "root" ]; then
-            TARGET_USER="$SUDO_USER"
-        elif [ -n "$USER" ] && [ "$USER" != "root" ]; then
-            TARGET_USER="$USER"
-        fi
+        TARGET_USER=$(get_installing_user)
+        echo "Installation triggered by user $TARGET_USER"
 
         # Add user to group if we found a valid target
         if [ -n "$TARGET_USER" ]; then
@@ -40,10 +62,14 @@ case "$1" in
                     exit 1
                 fi
             fi
+        else
+            echo "User $TARGET_USER is not a valid target. Not adding the user to group $GROUP_NAME"
         fi
 
         # Handle systemd service
         if [ -d /run/systemd/system ]; then
+            echo "Updating systemd service $SERVICE_NAME"
+
             # Reload systemd to recognize new service file
             systemctl daemon-reload
 
@@ -58,6 +84,7 @@ case "$1" in
     abort-upgrade|abort-remove|abort-deconfigure)
         # On failed operations, ensure service is running if it should be
         if [ -d /run/systemd/system ]; then
+            echo "Restarting systemd service $SERVICE_NAME"
             systemctl daemon-reload
             if systemctl is-enabled "$SERVICE_NAME" >/dev/null 2>&1; then
                 systemctl start "$SERVICE_NAME" || true
diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index 838d633e..d6b20f70 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -990,7 +990,7 @@ dependencies = [
 
 [[package]]
 name = "common"
-version = "1.6.3"
+version = "1.6.4"
 dependencies = [
  "nix",
 ]
@@ -1363,7 +1363,7 @@ checksum = "be1e0bca6c3637f992fc1cc7cbc52a78c1ef6db076dbf1059c4323d6a2048376"
 
 [[package]]
 name = "defguard-client"
-version = "1.6.3"
+version = "1.6.4"
 dependencies = [
  "anyhow",
  "async-stream",
@@ -1433,7 +1433,7 @@ dependencies = [
 
 [[package]]
 name = "defguard-dg"
-version = "1.6.3"
+version = "1.6.4"
 dependencies = [
  "clap",
  "common",
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index 36519efc..b9503398 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -31,7 +31,7 @@ edition = "2021"
 homepage = "https://github.com/DefGuard/client"
 license-file = "../LICENSE.md"
 rust-version = "1.85"
-version = "1.6.3"
+version = "1.6.4"
 
 [package]
 name = "defguard-client"
diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index f58453bc..a3a8cdd7 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -86,7 +86,7 @@
   "productName": "Defguard",
   "mainBinaryName": "defguard-client",
   "identifier": "net.defguard",
-  "version": "1.6.3",
+  "version": "1.6.4",
   "app": {
     "security": {
       "capabilities": [
diff --git a/swift/extension/VPNExtension.xcodeproj/project.pbxproj b/swift/extension/VPNExtension.xcodeproj/project.pbxproj
index f0d34342..f62b7893 100644
--- a/swift/extension/VPNExtension.xcodeproj/project.pbxproj
+++ b/swift/extension/VPNExtension.xcodeproj/project.pbxproj
@@ -322,7 +322,7 @@
 				);
 				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
 				MACOSX_DEPLOYMENT_TARGET = 13.5;
-				MARKETING_VERSION = 1.6.3;
+				MARKETING_VERSION = 1.6.4;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
@@ -417,7 +417,7 @@
 				);
 				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
 				MACOSX_DEPLOYMENT_TARGET = 13.5;
-				MARKETING_VERSION = 1.6.3;
+				MARKETING_VERSION = 1.6.4;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = net.defguard.VPNExtension;