diff --git a/Makefile b/Makefile
index 1c4da0c..cdf5975 100644
--- a/Makefile
+++ b/Makefile
@@ -47,6 +47,7 @@ ifeq ($(UNAME),Darwin)
   PKG_GL_LIBS=
   GLUILIBS=-framework Cocoa -framework OpenGL -framework CoreFoundation
   STRIPFLAGS=-u -r -arch all -s $(RW)lv2syms
+  EXTENDED_RE=-E
 else
   LV2LDFLAGS=-Wl,-Bstatic -Wl,-Bdynamic -Wl,--as-needed
   LIB_EXT=.so
@@ -57,6 +58,7 @@ else
   GLUILIBS=-lX11
   GLUICFLAGS+=`pkg-config --cflags glu`
   STRIPFLAGS= -s
+  EXTENDED_RE=-r
 endif
 
 ifneq ($(XWIN),)
@@ -84,6 +86,11 @@ endif
 targets+=$(BUILDDIR)$(LV2NAME)$(LIB_EXT)
 targets+=$(BUILDDIR)$(LV2GUI)$(LIB_EXT)
 
+###############################################################################
+# extract versions
+LV2VERSION=$(fil4_VERSION)
+include git2lv2.mk
+
 # check for build-dependencies
 ifeq ($(shell pkg-config --exists lv2 || echo no), no)
   $(error "LV2 SDK was not found")
@@ -219,10 +226,10 @@ $(BUILDDIR)$(LV2NAME).ttl: Makefile lv2ttl/$(LV2NAME).ttl.in \
 	@mkdir -p $(BUILDDIR)
 	sed "s/@LV2NAME@/$(LV2NAME)/g;s/@UI_TYPE@/$(UI_TYPE)/;s/@UI_REQ@/$(LV2UIREQ)/" \
 	    lv2ttl/$(LV2NAME).ttl.in > $(BUILDDIR)$(LV2NAME).ttl
-	sed "s/@LV2NAME@/$(LV2NAME)/g;s/@URISUFFIX@/mono/;s/@NAMESUFFIX@/ Mono/;s/@CTLSIZE@/65888/" \
+	sed "s/@LV2NAME@/$(LV2NAME)/g;s/@URISUFFIX@/mono/;s/@NAMESUFFIX@/ Mono/;s/@CTLSIZE@/65888/;s/@VERSION@/lv2:microVersion $(LV2MIC) ;lv2:minorVersion $(LV2MIN) ;/g" \
 	    lv2ttl/$(LV2NAME).ports.ttl.in >> $(BUILDDIR)$(LV2NAME).ttl
 	cat lv2ttl/$(LV2NAME).mono.ttl.in >> $(BUILDDIR)$(LV2NAME).ttl
-	sed "s/@LV2NAME@/$(LV2NAME)/g;s/@URISUFFIX@/stereo/;s/@NAMESUFFIX@/ Stereo/;s/@CTLSIZE@/131424/" \
+	sed "s/@LV2NAME@/$(LV2NAME)/g;s/@URISUFFIX@/stereo/;s/@NAMESUFFIX@/ Stereo/;s/@CTLSIZE@/131424/;s/@VERSION@/lv2:microVersion $(LV2MIC) ;lv2:minorVersion $(LV2MIN) ;/g" \
 	    lv2ttl/$(LV2NAME).ports.ttl.in >> $(BUILDDIR)$(LV2NAME).ttl
 	cat lv2ttl/$(LV2NAME).stereo.ttl.in >> $(BUILDDIR)$(LV2NAME).ttl
 
diff --git a/git2lv2.mk b/git2lv2.mk
new file mode 100644
index 0000000..879e11a
--- /dev/null
+++ b/git2lv2.mk
@@ -0,0 +1,43 @@
+
+###############################################################################
+# extract versions
+GIT_REV_REGEXP="([0-9][0-9]*)\.([0-9][0-9]*)(\.([0-9][0-9]*))?(-([0-9][0-9]*))?(-g([a-f0-9]+))?"
+
+override MAJOR=$(shell echo $(LV2VERSION) | sed $(EXTENDED_RE) -e s/$(GIT_REV_REGEXP)/\\1/)
+override MINOR=$(shell echo $(LV2VERSION) | sed $(EXTENDED_RE) -e s/$(GIT_REV_REGEXP)/\\2/)
+override MICRO=$(shell echo $(LV2VERSION) | sed $(EXTENDED_RE) -e s/$(GIT_REV_REGEXP)/\\4/)
+override GITREV=$(shell echo $(LV2VERSION) | sed $(EXTENDED_RE) -e s/$(GIT_REV_REGEXP)/\\6/)
+
+ifeq ($(MAJOR),)
+  override MAJOR=0
+endif
+ifeq ($(MINOR),)
+  override MINOR=0
+endif
+ifeq ($(MICRO),)
+  override MICRO=0
+endif
+
+$(info Version: $(LV2VERSION) -> $(MAJOR) $(MINOR) $(MICRO) $(GITREV))
+
+# version requirements, see
+# http://lv2plug.in/ns/lv2core/#minorVersion
+# http://lv2plug.in/ns/lv2core/#microVersion
+ifeq ($(GITREV),)
+# even numbers for tagged releases
+  override LV2MIN = $(shell expr $(MAJOR) \* 65536 + $(MINOR) \* 256 + $(MICRO) \* 2 )
+  override LV2MIC = 0
+else
+# odd-numbers for all non tagged git versions
+  override LV2MIN = $(shell expr $(MAJOR) \* 65536 + $(MINOR) \* 256 + $(MICRO) \* 2 + 1 )
+  override LV2MIC = $(shell expr $(GITREV) \* 2 + 1)
+endif
+
+ifeq ($(LV2MIN),)
+  $(error "Cannot extract required LV2 minor-version parameter")
+endif
+ifeq ($(LV2MIC),)
+  $(error "Cannot extract required LV2 micro-version parameter")
+endif
+
+$(info LV2 Version: $(LV2MIN) $(LV2MIC))
diff --git a/lv2ttl/fil4.ports.ttl.in b/lv2ttl/fil4.ports.ttl.in
index 0d64bcc..70cb4ab 100644
--- a/lv2ttl/fil4.ports.ttl.in
+++ b/lv2ttl/fil4.ports.ttl.in
@@ -3,6 +3,7 @@
 	a lv2:Plugin, doap:Project, lv2:ParaEQPlugin;
 	doap:license <http://usefulinc.com/doap/licenses/gpl> ;
 	doap:maintainer <http://gareus.org/rgareus#me> ;
+	@VERSION@
 	doap:name "4 Band Parametric EQ@NAMESUFFIX@";
 	lv2:requiredFeature urid:map ;
 	lv2:extensionData state:interface ;