diff --git a/backend/Makefile b/backend/Makefile
index 72b40e96..0b40fd14 100644
--- a/backend/Makefile
+++ b/backend/Makefile
@@ -41,7 +41,7 @@ libzint: code.c code128.c 2of5.c upcean.c medical.c telepen.c plessey.c postal.c
 	$(CC) -Wall -fPIC $(CFLAGS) $(ZINT_VERSION) -c $(POSTAL)
 	$(CC) -Wall -fPIC $(DEFINES) $(CFLAGS) $(ZINT_VERSION) -c $(TWODIM)
 	$(CC) -Wall -fPIC $(CFLAGS) $(ZINT_VERSION) -c $(COMMON)
-	$(CC) $(CFLAGS) $(ZINT_VERSION) -shared -Wl,-soname,libzint.so -o libzint.so.2.1.4 $(INCLUDE) $(COMMON_OBJ) $(ONEDIM_OBJ) $(TWODIM_OBJ) $(POSTAL_OBJ) $(LIBS)
+	$(CC) $(CFLAGS) $(ZINT_VERSION) -shared -Wl,-soname,libzint.so -o libzint.so.2.2.0 $(INCLUDE) $(COMMON_OBJ) $(ONEDIM_OBJ) $(TWODIM_OBJ) $(POSTAL_OBJ) $(LIBS)
 	ln -s libzint.so.* libzint.so
 
 .PHONY: install uninstall clean dist
diff --git a/backend/Makefile.mingw b/backend/Makefile.mingw
index 69b0443d..bf64785a 100644
--- a/backend/Makefile.mingw
+++ b/backend/Makefile.mingw
@@ -61,7 +61,7 @@ all: $(DLL) $(STATLIB)
 	 
 $(DLL):$(DLL_OBJ)
 	@echo Linking $@...
-	o2dll.sh -o $@ $(DLL_OBJ) $(LIBS) #-version-info 2:1:3 -version-number 2:1:3
+	o2dll.sh -o $@ $(DLL_OBJ) $(LIBS) #-version-info 2:2:0 -version-number 2:2:0
 
 $(STATLIB): $(LIB_OBJ)
 	@echo Linking $@...