diff --git a/Dockerfile b/Dockerfile
index 5f52989..ce0f853 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,10 +22,10 @@ RUN DEBIAN_FRONTEND=noninteractive \
     apt-get -y clean
 
 # Enter versions!!!
-ENV ZLIB_VERSION 1.2.8
+ENV ZLIB_VERSION 1.2.11
 ENV NCURSES_VERSION 6.0
 ENV READLINE_VERSION 7.0
-ENV OPENFST_VERSION 1.6.6
+ENV OPENFST_VERSION 1.6.7
 ENV OPENGRM_NGRAM_VERSION 1.3.4
 ENV THRAX_VERSION 1.2.5
 
@@ -164,6 +164,9 @@ RUN patch -p0 < thrax-utildefs-cc-mingw.patch
 COPY thrax-random-generator-cc-mingw.patch .
 RUN patch -p0 < thrax-random-generator-cc-mingw.patch
 
+COPY thrax-features-h-mingw.patch .
+RUN patch -p0 < thrax-features-h-mingw.patch
+
 RUN CPPFLAGS="-std=c++11 -I$C/include -DFST_NO_DYNAMIC_LINKING" \
     CXXFLAGS="-O2 -static-libgcc -static-libstdc++" \
     lt_cv_dlopen="LoadLibrary" \
diff --git a/thrax-features-h-mingw.patch b/thrax-features-h-mingw.patch
new file mode 100644
index 0000000..a791139
--- /dev/null
+++ b/thrax-features-h-mingw.patch
@@ -0,0 +1,11 @@
+--- src/include/thrax/features.h.orig   2018-03-13 17:49:52.514675116 +0000
++++ src/include/thrax/features.h        2018-03-13 17:50:34.955119225 +0000
+@@ -459,7 +459,7 @@
+         return nullptr;
+       }
+       int64 label = generated_symbols->Find(featval);
+-      if (label == fst::SymbolTable::kNoSymbol) {
++      if (label == fst::kNoSymbol) {
+         std::cout << "Feature/value pair " << featval << " is not defined."
+                   << std::endl;
+         delete generated_symbols;
\ No newline at end of file