diff --git a/projects/bignum-fuzzer/Dockerfile b/projects/bignum-fuzzer/Dockerfile
index 99c597f2f..f09b883b9 100644
--- a/projects/bignum-fuzzer/Dockerfile
+++ b/projects/bignum-fuzzer/Dockerfile
@@ -15,7 +15,7 @@
 ################################################################################
 
 FROM gcr.io/oss-fuzz-base/base-builder
-RUN apt-get update && apt-get install -y software-properties-common curl sudo mercurial autoconf bison texinfo libboost-all-dev cmake wget
+RUN apt-get update && apt-get install -y software-properties-common curl sudo mercurial autoconf bison texinfo libboost-all-dev cmake wget lzip
 RUN wget https://go.dev/dl/go1.17.5.linux-amd64.tar.gz && rm -rf /usr/local/go && tar -C /usr/local -xzf go1.17.5.linux-amd64.tar.gz && ldconfig
 ENV PATH=$PATH:/usr/local/go/bin
 
@@ -32,5 +32,7 @@ RUN wget https://www.bytereef.org/software/mpdecimal/releases/mpdecimal-2.5.1.ta
 RUN git clone --depth 1 https://github.com/guidovranken/bignum-fuzzer
 RUN git clone --depth 1 https://github.com/openssl/openssl
 RUN git clone https://boringssl.googlesource.com/boringssl
-RUN hg clone https://gmplib.org/repo/gmp/ libgmp/
+#RUN hg clone https://gmplib.org/repo/gmp/ libgmp/
+RUN wget --no-check-certificate https://gmplib.org/download/gmp/gmp-6.2.1.tar.lz
+RUN test "$(sha256sum gmp-6.2.1.tar.lz)" = "2c7f4f0d370801b2849c48c9ef3f59553b5f1d3791d070cffb04599f9fc67b41  gmp-6.2.1.tar.lz"
 COPY build.sh $SRC/
diff --git a/projects/bignum-fuzzer/build.sh b/projects/bignum-fuzzer/build.sh
index 737120006..a97059d41 100755
--- a/projects/bignum-fuzzer/build.sh
+++ b/projects/bignum-fuzzer/build.sh
@@ -15,6 +15,10 @@
 #
 ################################################################################
 
+cd $SRC/
+tar --lzip -xvf gmp-6.2.1.tar.lz
+mv $SRC/gmp-6.2.1/ $SRC/libgmp/
+
 # Install Rust nightly
 #curl https://sh.rustup.rs -sSf | sh -s -- -y
 #source $HOME/.cargo/env
diff --git a/projects/bls-signatures/Dockerfile b/projects/bls-signatures/Dockerfile
index 46c823f0a..aeaaf43cb 100644
--- a/projects/bls-signatures/Dockerfile
+++ b/projects/bls-signatures/Dockerfile
@@ -22,7 +22,8 @@ RUN git clone --depth 1 https://github.com/Chia-Network/bls-signatures.git
 RUN git clone --depth 1 https://github.com/herumi/mcl.git
 RUN git clone --depth 1 https://github.com/randombit/botan.git
 RUN wget https://boostorg.jfrog.io/artifactory/main/release/1.74.0/source/boost_1_74_0.tar.bz2
-RUN wget https://gmplib.org/download/gmp/gmp-6.2.1.tar.lz
+RUN wget --no-check-certificate https://gmplib.org/download/gmp/gmp-6.2.1.tar.lz
+RUN test "$(sha256sum gmp-6.2.1.tar.lz)" = "2c7f4f0d370801b2849c48c9ef3f59553b5f1d3791d070cffb04599f9fc67b41  gmp-6.2.1.tar.lz"
 RUN wget https://download.libsodium.org/libsodium/releases/libsodium-1.0.18-stable.tar.gz
 COPY build.sh $SRC/
 # This is to fix Fuzz Introspector build by using LLVM old pass manager
diff --git a/projects/cryptofuzz/Dockerfile b/projects/cryptofuzz/Dockerfile
index a19d9ce4c..800b34525 100644
--- a/projects/cryptofuzz/Dockerfile
+++ b/projects/cryptofuzz/Dockerfile
@@ -21,7 +21,7 @@ ENV PATH $PATH:/root/.go/bin:$GOPATH/bin
 RUN install_go.sh
 
 RUN apt-get update && \
-    apt-get install -y software-properties-common wget make autoconf automake libtool build-essential cmake mercurial gyp ninja-build zlib1g-dev libsqlite3-dev bison flex texinfo
+    apt-get install -y software-properties-common wget make autoconf automake libtool build-essential cmake mercurial gyp ninja-build zlib1g-dev libsqlite3-dev bison flex texinfo lzip
 
 RUN git clone --depth 1 https://github.com/guidovranken/cryptofuzz
 RUN git clone --depth 1 https://github.com/guidovranken/cryptofuzz-corpora
@@ -40,7 +40,9 @@ RUN hg clone https://hg.mozilla.org/projects/nss
 RUN git clone --depth 1 https://github.com/jedisct1/libsodium.git
 RUN git clone --depth 1 https://github.com/libtom/libtomcrypt.git
 RUN git clone --depth 1 https://github.com/microsoft/SymCrypt.git
-RUN hg clone https://gmplib.org/repo/gmp/ libgmp/
+#RUN hg clone https://gmplib.org/repo/gmp/ libgmp/
+RUN wget --no-check-certificate https://gmplib.org/download/gmp/gmp-6.2.1.tar.lz
+RUN test "$(sha256sum gmp-6.2.1.tar.lz)" = "2c7f4f0d370801b2849c48c9ef3f59553b5f1d3791d070cffb04599f9fc67b41  gmp-6.2.1.tar.lz"
 RUN wget https://www.bytereef.org/software/mpdecimal/releases/mpdecimal-2.5.1.tar.gz
 RUN git clone --depth 1 https://github.com/indutny/bn.js.git
 RUN git clone --depth 1 https://github.com/MikeMcl/bignumber.js.git
diff --git a/projects/cryptofuzz/build.sh b/projects/cryptofuzz/build.sh
index ac3827c5e..635001c73 100755
--- a/projects/cryptofuzz/build.sh
+++ b/projects/cryptofuzz/build.sh
@@ -15,6 +15,11 @@
 #
 ################################################################################
 
+cd $SRC/
+tar --lzip -xvf gmp-6.2.1.tar.lz
+mv $SRC/gmp-6.2.1/ $SRC/libgmp/
+
+
 # TODO(metzman): Switch this to LIB_FUZZING_ENGINE when it works.
 # https://github.com/google/oss-fuzz/issues/2336
 
diff --git a/projects/libecc/Dockerfile b/projects/libecc/Dockerfile
index 4d4543ca0..f211ac6a0 100644
--- a/projects/libecc/Dockerfile
+++ b/projects/libecc/Dockerfile
@@ -22,7 +22,8 @@ RUN git clone https://github.com/ANSSI-FR/libecc.git
 RUN git clone --depth 1 https://github.com/randombit/botan.git
 RUN git clone https://github.com/wolfssl/wolfssl
 RUN git clone --depth 1 https://github.com/guidovranken/cryptofuzz
-RUN wget https://gmplib.org/download/gmp/gmp-6.2.1.tar.lz
+RUN wget --no-check-certificate https://gmplib.org/download/gmp/gmp-6.2.1.tar.lz
+RUN test "$(sha256sum gmp-6.2.1.tar.lz)" = "2c7f4f0d370801b2849c48c9ef3f59553b5f1d3791d070cffb04599f9fc67b41  gmp-6.2.1.tar.lz"
 RUN wget https://boostorg.jfrog.io/artifactory/main/release/1.74.0/source/boost_1_74_0.tar.bz2
 COPY build.sh $SRC/
 # This is to fix Fuzz Introspector build by using LLVM old pass manager
diff --git a/projects/libressl/Dockerfile b/projects/libressl/Dockerfile
index 2e0ecbf88..e60aa47f0 100644
--- a/projects/libressl/Dockerfile
+++ b/projects/libressl/Dockerfile
@@ -24,7 +24,8 @@ RUN git clone --depth 1 https://github.com/guidovranken/cryptofuzz
 RUN git clone --depth 1 https://github.com/guidovranken/cryptofuzz-corpora
 RUN wget https://boostorg.jfrog.io/artifactory/main/release/1.74.0/source/boost_1_74_0.tar.bz2
 RUN git clone --depth 1 https://github.com/randombit/botan.git
-RUN wget https://gmplib.org/download/gmp/gmp-6.2.1.tar.lz
+RUN wget --no-check-certificate https://gmplib.org/download/gmp/gmp-6.2.1.tar.lz
+RUN test "$(sha256sum gmp-6.2.1.tar.lz)" = "2c7f4f0d370801b2849c48c9ef3f59553b5f1d3791d070cffb04599f9fc67b41  gmp-6.2.1.tar.lz"
 WORKDIR libressl
 RUN ./update.sh
 COPY build.sh *.options $SRC/
diff --git a/projects/nettle/Dockerfile b/projects/nettle/Dockerfile
index cdce6435b..75f2835fa 100644
--- a/projects/nettle/Dockerfile
+++ b/projects/nettle/Dockerfile
@@ -23,7 +23,8 @@ RUN git clone --depth 1 https://github.com/randombit/botan.git
 RUN git clone --depth 1 https://github.com/guidovranken/cryptofuzz
 RUN git clone --depth 1 https://github.com/guidovranken/cryptofuzz-corpora
 RUN wget https://boostorg.jfrog.io/artifactory/main/release/1.74.0/source/boost_1_74_0.tar.bz2
-RUN wget https://gmplib.org/download/gmp/gmp-6.2.0.tar.lz
+RUN wget --no-check-certificate https://gmplib.org/download/gmp/gmp-6.2.1.tar.lz
+RUN test "$(sha256sum gmp-6.2.1.tar.lz)" = "2c7f4f0d370801b2849c48c9ef3f59553b5f1d3791d070cffb04599f9fc67b41  gmp-6.2.1.tar.lz"
 COPY build.sh $SRC/
 # This is to fix Fuzz Introspector build by using LLVM old pass manager
 # re https://github.com/ossf/fuzz-introspector/issues/305
diff --git a/projects/nettle/build.sh b/projects/nettle/build.sh
index e10c5d7e0..578c1d5b3 100755
--- a/projects/nettle/build.sh
+++ b/projects/nettle/build.sh
@@ -37,10 +37,10 @@ if [[ $CFLAGS != *sanitize=memory* ]]
 then
     # Compile libgmp
         cd $SRC/
-        lzip -d gmp-6.2.0.tar.lz
-        tar xf gmp-6.2.0.tar
+        lzip -d gmp-6.2.1.tar.lz
+        tar xf gmp-6.2.1.tar
 
-        cd gmp-6.2.0/
+        cd gmp-6.2.1/
         autoreconf -ivf
         if [[ $CFLAGS != *-m32* ]]
         then