diff --git a/.github/workflows/master.yml b/.github/workflows/master.yml
index e0d4659f8b..eee2c4fd6d 100644
--- a/.github/workflows/master.yml
+++ b/.github/workflows/master.yml
@@ -133,6 +133,10 @@ jobs:
       - name: Building Macos Binary
         run: MACOSX_DEPLOYMENT_TARGET=10.12 OPENSSL_STATIC=1 OPENSSL_DIR="/usr/local/opt/openssl" cargo build --release -p witnet -p witnet_toolkit
 
+      # Ensure that distributable binary files can be executed
+      - name: Make binaries executable
+        run: chmod +x target/release/witnet*
+
       # Upload Build Releases
       - uses: actions/upload-artifact@v3
         with:
diff --git a/docker/cross-compilation/aarch64-unknown-linux-gnu/Dockerfile b/docker/cross-compilation/aarch64-unknown-linux-gnu/Dockerfile
index efa395f267..4b262f7a1a 100644
--- a/docker/cross-compilation/aarch64-unknown-linux-gnu/Dockerfile
+++ b/docker/cross-compilation/aarch64-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:latest
+FROM ubuntu:focal
 
 # Install basic environment dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends \
diff --git a/docker/cross-compilation/arm-unknown-linux-gnueabihf/Dockerfile b/docker/cross-compilation/arm-unknown-linux-gnueabihf/Dockerfile
index b633f8a4f5..f513de2aa1 100644
--- a/docker/cross-compilation/arm-unknown-linux-gnueabihf/Dockerfile
+++ b/docker/cross-compilation/arm-unknown-linux-gnueabihf/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:latest
+FROM ubuntu:focal
 
 # Install basic environment dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends \
diff --git a/docker/cross-compilation/armv7-unknown-linux-gnueabihf/Dockerfile b/docker/cross-compilation/armv7-unknown-linux-gnueabihf/Dockerfile
index af14a17e26..4f344bfecb 100644
--- a/docker/cross-compilation/armv7-unknown-linux-gnueabihf/Dockerfile
+++ b/docker/cross-compilation/armv7-unknown-linux-gnueabihf/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:latest
+FROM ubuntu:focal
 
 # Install basic environment dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends \
diff --git a/docker/cross-compilation/x86_64-unknown-linux-gnu/Dockerfile b/docker/cross-compilation/x86_64-unknown-linux-gnu/Dockerfile
index ec9746b9cc..fc83400fc5 100644
--- a/docker/cross-compilation/x86_64-unknown-linux-gnu/Dockerfile
+++ b/docker/cross-compilation/x86_64-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:latest
+FROM ubuntu:focal
 
 # Install basic environment dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends \
diff --git a/docker/witnet-rust/Dockerfile b/docker/witnet-rust/Dockerfile
index e4d918bfb5..0033645bf1 100644
--- a/docker/witnet-rust/Dockerfile
+++ b/docker/witnet-rust/Dockerfile
@@ -1,4 +1,4 @@
-FROM --platform=$TARGETPLATFORM ubuntu:focal
+FROM --platform=$TARGETPLATFORM ubuntu:jammy
 
 # Install basic environment dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends \
diff --git a/docker/witnet-rust/downloader.sh b/docker/witnet-rust/downloader.sh
index 5e30371822..2e614a321e 100755
--- a/docker/witnet-rust/downloader.sh
+++ b/docker/witnet-rust/downloader.sh
@@ -16,6 +16,10 @@ if [[ "$TRIPLET" == *"linux"* ]]; then
     TRIPLET=${TRIPLET/pc/unknown}
 fi
 
+if [[ "$TRIPLET" == *"arm-"* ]]; then
+    TRIPLET=${TRIPLET/arm/armv7}
+fi
+
 URL="https://github.com/witnet/witnet-rust/releases/download/$VERSION/witnet-$VERSION-$TRIPLET.tar.gz"
 
 FILENAME="$VERSION.tar.gz"