diff --git a/src/compiler/gf.cabal b/src/compiler/gf.cabal
index 84e3ad832..abeca9fa1 100644
--- a/src/compiler/gf.cabal
+++ b/src/compiler/gf.cabal
@@ -1,5 +1,5 @@
 name: gf
-version: 3.11.0-git
+version: 4.0.0
 
 cabal-version: 1.22
 build-type: Simple
diff --git a/src/runtime/c/Makefile.am b/src/runtime/c/Makefile.am
index 7765ab300..8cd82fb20 100644
--- a/src/runtime/c/Makefile.am
+++ b/src/runtime/c/Makefile.am
@@ -38,7 +38,7 @@ libpgf_la_SOURCES = \
 	pgf/phrasetable.cxx \
 	pgf/phrasetable.h
 
-libpgf_la_LDFLAGS = -no-undefined
+libpgf_la_LDFLAGS = -no-undefined -version-info 4:0:0
 libpgf_la_CXXFLAGS = -fno-rtti -std=c++11 -DCOMPILING_PGF
 
 bin_PROGRAMS =
diff --git a/src/runtime/haskell/pgf2.cabal b/src/runtime/haskell/pgf2.cabal
index 2551ae7a0..2cd5801a5 100644
--- a/src/runtime/haskell/pgf2.cabal
+++ b/src/runtime/haskell/pgf2.cabal
@@ -1,5 +1,5 @@
 name: pgf2
-version: 2.0.0
+version: 4.0.0
 
 cabal-version: 1.22
 build-type: Simple