diff --git a/Makefile b/Makefile
index bdfbccf..238ae81 100644
--- a/Makefile
+++ b/Makefile
@@ -5,11 +5,14 @@ DESKTOP_DIR := $(DESTDIR)/usr/share/applications
 DATA_DIR := $(DESTDIR)/usr/share/flatpost
 ICON_DIR := $(DESTDIR)/usr/share/icons/hicolor
 LICENSE_DIR := $(DESTDIR)/usr/share/licenses/flatpost
+VERSION := $(shell cat VERSION.txt)
 
-.PHONY: all install clean
+.PHONY: all update-version install clean
 
-all: install
+all: update-version install
 
+update-version:
+	sed -i 's/^Version .*/Version $(VERSION)/' src/flatpost.py
 install:
 	@echo "Installing Python files to $(TARGET_DIR)"
 	mkdir -p $(TARGET_DIR)
diff --git a/VERSION.txt b/VERSION.txt
new file mode 100644
index 0000000..90a27f9
--- /dev/null
+++ b/VERSION.txt
@@ -0,0 +1 @@
+1.0.5
diff --git a/src/flatpost.py b/src/flatpost.py
index 64495b0..1247d27 100755
--- a/src/flatpost.py
+++ b/src/flatpost.py
@@ -658,7 +658,7 @@ class MainWindow(Gtk.Window):
         # Version label
         name_label = Gtk.Label(label="Flatpost")
         name_label.get_style_context().add_class("permissions-header-label")
-        version_label = Gtk.Label(label="Version 1.0.0")
+        version_label = Gtk.Label(label="Version 1.0.5")
         copyright_label = Gtk.Label(label=f"Copyright © 2025-{datetime.now().year} Thomas Crider")
         program_label = Gtk.Label(label="This program comes with absolutely no warranty.")