diff --git a/CHANGELOG.md b/CHANGELOG.md
index 024b8a0..d2ad07b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,22 @@
 # Changelog
 
+## v1.4.0
+
+- New features:
+  - Configurable constant lines for XY-plots
+  - Limit testing on XY-plots
+  - Single sweep functionality
+  - Zero span support for VNA and SA
+  
+- Bugfixes:
+  - Stop duplicate GUI elements from appearing when loading a setup file
+  - Prevent wrong frequency output when sweep starts at DC
+  - Improve automatic source/receiver calibration
+  - Fix signal ID issue which caused valid signals to disappear at low RBWs
+  - Changing trace color triggers replot of graphs
+  - Remove output spikes in generator mode, caused by continuously reconfiguring the PLL
+  - Fix MCU temperature calculation
+
 ## v1.3.0
 
 Some new software features along with a few bug fixes.
@@ -13,7 +30,7 @@ Some new software features along with a few bug fixes.
   - logarithmic sweeps (logarithmic frequency steps)
   - Graph display improvements:
     - (Optionally) show units on all axes
-    - Configurable font size  
+    - Configurable font size
 	- New Y axis options: dBuV, linear magnitude, unwrapped phase, group delay
 	- Zoom feature for smith chart
   - User-selectable IF frequencies
diff --git a/Software/PC_Application/LibreVNA-GUI.pro b/Software/PC_Application/LibreVNA-GUI.pro
index ccf04e4..bd60738 100644
--- a/Software/PC_Application/LibreVNA-GUI.pro
+++ b/Software/PC_Application/LibreVNA-GUI.pro
@@ -317,5 +317,5 @@ RESOURCES += \
 CONFIG += c++17
 REVISION = $$system(git rev-parse HEAD)
 DEFINES += GITHASH=\\"\"$$REVISION\\"\"
-DEFINES += FW_MAJOR=1 FW_MINOR=3 FW_PATCH=0 FW_SUFFIX=""#\\"\"-alpha.2\\"\"
+DEFINES += FW_MAJOR=1 FW_MINOR=4 FW_PATCH=0 FW_SUFFIX=""#\\"\"-alpha.2\\"\"
 DEFINES -= _UNICODE UNICODE
diff --git a/Software/VNA_embedded/.cproject b/Software/VNA_embedded/.cproject
index ac3981a..8278692 100644
--- a/Software/VNA_embedded/.cproject
+++ b/Software/VNA_embedded/.cproject
@@ -43,7 +43,7 @@
 									<listOptionValue builtIn="false" value="_RTOS"/>
 									<listOptionValue builtIn="false" value="_SNK"/>
 									<listOptionValue builtIn="false" value="FW_MAJOR=1"/>
-									<listOptionValue builtIn="false" value="FW_MINOR=3"/>
+									<listOptionValue builtIn="false" value="FW_MINOR=4"/>
 									<listOptionValue builtIn="false" value="FW_PATCH=0"/>
 									<listOptionValue builtIn="false" value="HW_REVISION='B'"/>
 									<listOptionValue builtIn="false" value="USE_FULL_LL_DRIVER"/>
@@ -90,7 +90,7 @@
 								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.cpp.compiler.option.definedsymbols.536220696" name="Define symbols (-D)" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.cpp.compiler.option.definedsymbols" useByScannerDiscovery="false" valueType="definedSymbols">
 									<listOptionValue builtIn="false" value="DEBUG"/>
 									<listOptionValue builtIn="false" value="FW_MAJOR=1"/>
-									<listOptionValue builtIn="false" value="FW_MINOR=3"/>
+									<listOptionValue builtIn="false" value="FW_MINOR=4"/>
 									<listOptionValue builtIn="false" value="FW_PATCH=0"/>
 									<listOptionValue builtIn="false" value="HW_REVISION='B'"/>
 									<listOptionValue builtIn="false" value="USE_FULL_LL_DRIVER"/>
diff --git a/Software/VNA_embedded/Makefile b/Software/VNA_embedded/Makefile
index 41f9ba4..2290cd8 100644
--- a/Software/VNA_embedded/Makefile
+++ b/Software/VNA_embedded/Makefile
@@ -100,7 +100,7 @@ MCU = $(CPU) -mthumb $(FLOAT-ABI) $(FPU)
 # C defines
 C_DEFS =  \
 -DFW_MAJOR=1 \
--DFW_MINOR=3 \
+-DFW_MINOR=4 \
 -DFW_PATCH=0 \
 -DDEBUG \
 -DUSE_FULL_LL_DRIVER \