diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1087767..5e5636d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,26 @@
 # Changelog
 
+## v1.5.1
+
+Mostly bugfixes with only minor new features
+
+- New features:
+  - Z0 of through standard now adjustable
+  - Option to automatically adjust the span to the active calibration
+- Bugfixes:
+  - Make De-embedding menu visible on MacOS
+  - Detection of handling of LibreCAL in the automatic calibration dialog
+  - Allow updates of devices with older firmwares (a matching older GUI version had to be used previously)
+  - Fix port excitation when not all S-parameters are measured
+  - Do not use DFT in spectrum analyzer when in zero span mode
+  - Readback of certain GUI values on Windows now correct (was stuck on 0 before)
+  - Prevent crash when disconnecting the device while a dialog was open
+  - Prevent occasional crash at the end of calibration measurements
+  - Fix spikes in sweep when a frequency calibration is set
+  - Improve sample timing between ADC and FPGA (resulted in very noisy traces on some devices)
+
 ## v1.5.0
+
 - New features:
   - Further abstraction from the LibreVNA hardware. The GUI now supports VNAs with up to 8 ports
   - Capsulation of communication to the hardware inside of the DeviceDriver class. This simplifies the integration of drivers for other equipment
@@ -56,7 +76,7 @@
 ## v1.3.0
 
 Some new software features along with a few bug fixes.
-  
+
 - New features:
   - Allow multiple VNA/Signal generator/Spectrum analyzer tabs
   - Software work-around to allow up to 65535 points per sweep
diff --git a/Software/PC_Application/LibreVNA-GUI/LibreVNA-GUI.pro b/Software/PC_Application/LibreVNA-GUI/LibreVNA-GUI.pro
index 9fb18d6..e119bc7 100644
--- a/Software/PC_Application/LibreVNA-GUI/LibreVNA-GUI.pro
+++ b/Software/PC_Application/LibreVNA-GUI/LibreVNA-GUI.pro
@@ -395,5 +395,5 @@ QMAKE_CXXFLAGS += -Wno-deprecated -Wno-deprecated-declarations -Wno-deprecated-c
 CONFIG += c++17
 REVISION = $$system(git rev-parse HEAD)
 DEFINES += GITHASH=\\"\"$$REVISION\\"\"
-DEFINES += FW_MAJOR=1 FW_MINOR=5 FW_PATCH=0 FW_SUFFIX=""
+DEFINES += FW_MAJOR=1 FW_MINOR=5 FW_PATCH=1 FW_SUFFIX=""
 DEFINES -= _UNICODE UNICODE
diff --git a/Software/VNA_embedded/.cproject b/Software/VNA_embedded/.cproject
index cdf3c65..b457c0d 100644
--- a/Software/VNA_embedded/.cproject
+++ b/Software/VNA_embedded/.cproject
@@ -44,7 +44,7 @@
 									<listOptionValue builtIn="false" value="_SNK"/>
 									<listOptionValue builtIn="false" value="FW_MAJOR=1"/>
 									<listOptionValue builtIn="false" value="FW_MINOR=5"/>
-									<listOptionValue builtIn="false" value="FW_PATCH=0"/>
+									<listOptionValue builtIn="false" value="FW_PATCH=1"/>
 									<listOptionValue builtIn="false" value="HW_REVISION='B'"/>
 									<listOptionValue builtIn="false" value="USE_FULL_LL_DRIVER"/>
 									<listOptionValue builtIn="false" value="USE_HAL_DRIVER"/>
@@ -91,7 +91,7 @@
 									<listOptionValue builtIn="false" value="DEBUG"/>
 									<listOptionValue builtIn="false" value="FW_MAJOR=1"/>
 									<listOptionValue builtIn="false" value="FW_MINOR=5"/>
-									<listOptionValue builtIn="false" value="FW_PATCH=0"/>
+									<listOptionValue builtIn="false" value="FW_PATCH=1"/>
 									<listOptionValue builtIn="false" value="HW_REVISION='B'"/>
 									<listOptionValue builtIn="false" value="USE_FULL_LL_DRIVER"/>
 									<listOptionValue builtIn="false" value="USE_HAL_DRIVER"/>
@@ -302,4 +302,4 @@
 			<resource resourceType="PROJECT" workspacePath="/VNA_embedded"/>
 		</configuration>
 	</storageModule>
-</cproject>
+</cproject>
\ No newline at end of file
diff --git a/Software/VNA_embedded/Makefile b/Software/VNA_embedded/Makefile
index 0fb6706..0e74cae 100644
--- a/Software/VNA_embedded/Makefile
+++ b/Software/VNA_embedded/Makefile
@@ -101,7 +101,7 @@ MCU = $(CPU) -mthumb $(FLOAT-ABI) $(FPU)
 C_DEFS =  \
 -DFW_MAJOR=1 \
 -DFW_MINOR=5 \
--DFW_PATCH=0 \
+-DFW_PATCH=1 \
 -DDEBUG \
 -DUSE_FULL_LL_DRIVER \
 -DHW_REVISION="'B'" \