diff --git a/Dockerfile b/Dockerfile
index 77f7dd4..e5e3b8b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,31 +1,43 @@
 FROM ubuntu:18.04
 
-# CUSTOM VARIABLES
-ENV GOLANG=go1.13.5.linux-amd64.tar.gz
-
 # ENV VARIABLES
+ENV GOLANG=go1.13.5.linux-amd64.tar.gz
 ENV GOROOT=/usr/local/go
 ENV GOPATH=/native/altbn128
 ENV GOBIN=$GOPATH/bin
-ENV PATH=$GOPATH/bin:$GOROOT/bin:$PATH
 ENV JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
 ENV CGO_CFLAGS="-I$JAVA_HOME/include -I$JAVA_HOME/include/linux"
+ENV PATH=$GOPATH/bin:$GOROOT/bin:$PATH
+
+# DEPENDENCIES
 
-RUN apt-get update && \
- apt-get -y install git && \
- apt-get -y install tree && \
- apt-get install -y -o APT::Install-Suggests="false" git curl openjdk-8-jdk build-essential=12.4ubuntu1 && \
- apt-get install -y -o APT::Install-Suggests="true" autoconf && \
- curl "https://dl.google.com/go/"$GOLANG -o $GOLANG -# && \
- echo "512103d7ad296467814a6e3f635631bd35574cab3369a97a323c9a585ccaa569  go1.13.5.linux-amd64.tar.gz" > goChecksum.txt && \
+# common
+RUN apt-get update
+RUN apt-get install -y build-essential
+RUN apt-get install -y -o APT::Install-Suggests="false" git tree curl openjdk-8-jdk
+
+# secp25k1 dependencies
+RUN apt-get install -y autoconf libtool
+
+# altbn128 dependencies
+RUN curl "https://dl.google.com/go/"$GOLANG -o $GOLANG -# && \
+ echo "512103d7ad296467814a6e3f635631bd35574cab3369a97a323c9a585ccaa569  $GOLANG" > goChecksum.txt && \
  cat goChecksum.txt && \
  sha256sum -c goChecksum.txt && \
- tar -xvf $GOLANG && mkdir -p $GOCUSTOM && mv go $GOCUSTOM
-RUN curl "https://sh.rustup.rs" -sSf | bash -s -- -y
+ tar -xvf $GOLANG && \
+ mkdir -p /usr/local && \
+ mv go /usr/local
 
-
-#Cloning native's repo
-#RUN git clone https://github.com/rsksmart/native.git
+# bls12-381 dependencies
+RUN curl "https://sh.rustup.rs" -sSf | bash -s -- -y
+RUN apt-get install -y clang gcc g++ zlib1g-dev libmpc-dev libmpfr-dev libgmp-dev wget cmake libxml2-dev libssl-dev gcc-mingw-w64-x86-64
+RUN git clone https://github.com/tpoechtrager/osxcross && \
+ cd osxcross && \
+ wget -nc https://s3.dockerproject.org/darwin/v2/MacOSX10.10.sdk.tar.xz&& \
+ mv MacOSX10.10.sdk.tar.xz tarballs/ && \
+ UNATTENDED=yes OSX_VERSION_MIN=10.7 ./build.sh
+
+# Cloning native's repo
 COPY . /native
 WORKDIR /native
 
@@ -36,4 +48,3 @@ RUN cp -r jniheaders/include $JAVA_HOME
 WORKDIR /native
 ENTRYPOINT ["./gradlew"]
 CMD ["buildProject"]
-
diff --git a/README.md b/README.md
index 7ba7386..7f46f80 100644
--- a/README.md
+++ b/README.md
@@ -6,25 +6,24 @@ In this project you'll find all the native libraries used in rskj.
 
 - altbn128
 - [secp256k1](secp256k1/README.md)
+- [bls12-381](bls12_381/README.md)
 
-## Build
-
-Currently productive build will only compile for linux systems (but every build command is mac compatilble).
-Mac support for productive env will be added in future releases.
 
-### Productive
+### Compatibility
 
-```bash
-> docker build -t native-libs .
-> docker run --rm -v $(pwd)/build:/native/build native-libs
-```
+| Library       | Linux         | Mac OS    | Windows (x64)  |
+| ------------- |:-------------:| :--------:| :-------:|
+| altbn128      | x             |           |          |
+| secp256k1     | x             |           |          |
+| bls12-381     | x             | x         | x        |
 
-### Dev
+## Build
 
-Build every library and wrap them into native.jar
+Builds each library, runs all the tests (only for linux) and bundles `native-x.y.z.jar`
 
 ```bash
-> ./gradlew buildProject
+> docker build -t native-libs .
+> docker run --rm -v $(pwd)/build:/native/build native-libs
 ```
 
 ## Build a Specific Library
@@ -40,26 +39,29 @@ To build an specific library
 
 > ./gradlew buildSecp256k1
 
-# bls12-381 (req: cargo)
+# bls12-381 (req: rust)
 
 > ./gradlew buildBls12_381
 ```
 
 ## Checksums
 
-```
-libbn128.so: 669543be939058001ffb5ca3b816d3961f39db82dad60dfd0ffc89540956dc6f
+```bash
+# altbn128
+libbn128.so: ee41baa43b5a3927e99c2d0f826666e5baf2885ec0d689ea3c591db35ad9ae47
+
+# secp256k1
 libsecp256k1.so: 0b99909b0c86b3f4bcad90f70eef81d7b5fd77f7d29997195b3291526e5cd7f0
-libeth_pairings.so: 2a1d00f77ce59c4cede20a354cf523dd81a1bfc80a68ad0ea70322b420a88908
-native-1.2.1.jar: b1357a0619596d496d01b095ceb45819337b0ee457b9df9cef4144ed560ea715
+
+# bls12-381
+libeth_pairings.so: da214a3c3d66b057a6d3636161da977fdd8dee638a82919e86c18a6137ca0d04
+eth_pairings.dll: bb78b4dbfbf12bdb4daff1acbd682c3df9da2d7c755bc776808d634889e5d6f0
+
+native-1.3.0.jar: 58e707310e43f16e3e238469c26a777bc8ad4e3b3d0f7baf9a89ec881e53a1c5
 go1.13.5.linux-amd64.tar.gz: 512103d7ad296467814a6e3f635631bd35574cab3369a97a323c9a585ccaa569
 
 $ java -version
-openjdk version "1.8.0_265"
-OpenJDK Runtime Environment (build 1.8.0_265-8u265-b01-0ubuntu2~18.04-b01)
-OpenJDK 64-Bit Server VM (build 25.265-b01, mixed mode)
+openjdk version "1.8.0_275"
+OpenJDK Runtime Environment (build 1.8.0_275-8u275-b01-0ubuntu1~18.04-b01)
+OpenJDK 64-Bit Server VM (build 25.275-b01, mixed mode)
 ```
-
-## Disclaimer
-
-Experimental/dev features should only be used under your own risk.
diff --git a/bls12_381/.cargo/config b/bls12_381/.cargo/config
new file mode 100644
index 0000000..4727075
--- /dev/null
+++ b/bls12_381/.cargo/config
@@ -0,0 +1,3 @@
+[target.x86_64-apple-darwin]
+linker = "x86_64-apple-darwin14-clang"
+ar = "x86_64-apple-darwin14-ar"
\ No newline at end of file
diff --git a/bls12_381/build.sh b/bls12_381/build.sh
index 1c5fc42..62d5412 100755
--- a/bls12_381/build.sh
+++ b/bls12_381/build.sh
@@ -1,15 +1,33 @@
 #!/bin/bash
 
+JAVA_BLS_RESOURCES="/native/src/main/resources/co/rsk/bls12_381"
+PATH="/osxcross/target/bin:$PATH"
 PATH="$HOME/.cargo/bin:$PATH"
 
 # delete old build dir, if exists
 rm -rf "target/" && \
-rm -rf "/native/src/main/resources/co/rsk/bls12_381" || true && \
-mkdir -p "/native/src/main/resources/co/rsk/bls12_381" && \
+rm -rf $JAVA_BLS_RESOURCES && \
+mkdir -p $JAVA_BLS_RESOURCES && \
+mkdir $JAVA_BLS_RESOURCES/macos && \
+mkdir $JAVA_BLS_RESOURCES/linux && \
+mkdir $JAVA_BLS_RESOURCES/win && \
 
-# clean & build bls12-381
+# clean & build bls12-381 (linux)
+rustup target add x86_64-unknown-linux-gnu && \
+rustup toolchain install stable-x86_64-unknown-linux-gnu && \
 cargo clean && \
-cargo build --lib --features eip_2357_c_api --release && \
+cargo build --lib --features eip_2357_c_api --release --target x86_64-unknown-linux-gnu && \
+cp target/x86_64-unknown-linux-gnu/release/libeth_pairings.so $JAVA_BLS_RESOURCES/linux &&\
 
-# move to resources
-cp target/release/libeth_pairings.so "/native/src/main/resources/co/rsk/bls12_381"
+# clean & build bls12-381 (windows 64 bits)
+rustup target add x86_64-pc-windows-gnu && \
+rustup toolchain install stable-x86_64-pc-windows-gnu && \
+cargo clean && \
+cargo build --lib --features eip_2357_c_api --release --target x86_64-pc-windows-gnu && \
+cp target/x86_64-pc-windows-gnu/release/eth_pairings.dll $JAVA_BLS_RESOURCES/win
+
+# clean & build bls12-381 (mac) - toolchain: osxcross
+rustup target add x86_64-apple-darwin && \
+cargo clean && \
+cargo build --lib --features eip_2357_c_api --release --target x86_64-apple-darwin && \
+cp target/x86_64-apple-darwin/release/libeth_pairings.dylib $JAVA_BLS_RESOURCES/macos
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 6b25b99..e07625a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,7 +3,7 @@ import java.util.jar.JarFile
 import java.util.jar.JarOutputStream
 
 group 'co.rsk'
-version '1.2.0'
+version '1.3.0'
 
 buildscript {
     repositories {