diff --git a/.github/install-zulu11.sh b/.github/install-zulu11.sh
index 562627c..2a82e17 100755
--- a/.github/install-zulu11.sh
+++ b/.github/install-zulu11.sh
@@ -4,7 +4,7 @@ set -euf
 
 AZUL_GPG_KEY=0xB1998361219BD9C9
 ZULU_VERSION=11
-ZULU_RELEASE=11.0.11-1
+ZULU_RELEASE=11.0.12-1
 
 sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys ${AZUL_GPG_KEY}
 sudo apt-add-repository 'deb http://repos.azulsystems.com/ubuntu stable main'
diff --git a/.github/install-zulu8.sh b/.github/install-zulu8.sh
index 2a48748..ae2c401 100755
--- a/.github/install-zulu8.sh
+++ b/.github/install-zulu8.sh
@@ -4,7 +4,7 @@ set -euf
 
 AZUL_GPG_KEY=0xB1998361219BD9C9
 ZULU_VERSION=8
-ZULU_RELEASE=8.0.292-1
+ZULU_RELEASE=8.0.302-1
 
 sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys ${AZUL_GPG_KEY}
 sudo apt-add-repository 'deb http://repos.azulsystems.com/ubuntu stable main'
diff --git a/.travis/install-maven.sh b/.travis/install-maven.sh
index bf05cba..a3e5571 100755
--- a/.travis/install-maven.sh
+++ b/.travis/install-maven.sh
@@ -3,8 +3,8 @@
 set -euf
 
 MAVEN_BASE_URL=https://archive.apache.org/dist/maven/maven-3/
-MAVEN_VERSION=3.6.3
-MAVEN_SHA=26ad91d751b3a9a53087aefa743f4e16a17741d3915b219cf74112bf87a438c5
+MAVEN_VERSION=3.8.1
+MAVEN_SHA=b98a1905eb554d07427b2e5509ff09bd53e2f1dd7a0afa38384968b113abef02
 
 sudo apt-get update
 sudo apt-get install -y curl
@@ -13,7 +13,7 @@ sudo curl -fsSL -o /tmp/apache-maven.tar.gz ${MAVEN_BASE_URL}/${MAVEN_VERSION}/b
 echo "${MAVEN_SHA} /tmp/apache-maven.tar.gz" | sha256sum -c -
 sudo tar -xzf /tmp/apache-maven.tar.gz -C /usr/share/maven --strip-components=1
 sudo rm -f /tmp/apache-maven.tar.gz
-sudo ln -s /usr/share/maven/bin/mvn /usr/bin/mvn
+sudo ln -fs /usr/share/maven/bin/mvn /usr/bin/mvn
 mvn -version
 
 set +euf
\ No newline at end of file
diff --git a/.travis/install-zulu.sh b/.travis/install-zulu.sh
index 9fac9b1..e56d379 100755
--- a/.travis/install-zulu.sh
+++ b/.travis/install-zulu.sh
@@ -4,7 +4,7 @@ set -euf
 
 AZUL_GPG_KEY=0xB1998361219BD9C9
 ZULU_VERSION=8
-ZULU_RELEASE=8.0.292-1
+ZULU_RELEASE=8.0.302-1
 JAVA_HOME=/usr/lib/jvm/zulu-8-amd64
 
 sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys ${AZUL_GPG_KEY}
@@ -13,8 +13,8 @@ sudo apt-get update
 sudo apt-get install -y zulu-repo
 sudo apt-get update
 sudo apt-get install -y zulu${ZULU_VERSION}=${ZULU_RELEASE}
-sudo sed -i.orig -e "s/^hl /jre /g" -e "s/^jdkhl /jdk /g" /usr/lib/jvm/.zulu8-ca-amd64.jinfo
-sudo update-java-alternatives --set zulu8-ca-amd64
+sudo sed -i.orig -e "s/^hl /jre /g" -e "s/^jdkhl /jdk /g" /usr/lib/jvm/.zulu${ZULU_VERSION}-ca-amd64.jinfo
+sudo update-java-alternatives --set zulu${ZULU_VERSION}-ca-amd64
 export ALTERNATIVES_JAVAC=$(realpath /etc/alternatives/javac)
 export JAVA_HOME=${ALTERNATIVES_JAVAC%/bin/javac}
 export PATH=$JAVA_HOME/bin:$PATH
diff --git a/pom.xml b/pom.xml
index 04083ac..36cb52f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -112,7 +112,7 @@
         <!-- Plugin versioning -->
         <build-helper-maven-plugin.version>3.2.0</build-helper-maven-plugin.version>
         <directory-maven-plugin.version>0.3.1</directory-maven-plugin.version>
-        <download-maven-plugin.version>1.6.3</download-maven-plugin.version>
+        <download-maven-plugin.version>1.6.6</download-maven-plugin.version>
         <exec-maven-plugin.version>3.0.0</exec-maven-plugin.version>
         <git-commit-id-plugin.version>4.0.5</git-commit-id-plugin.version>
         <jacoco-maven-plugin.version>0.8.7</jacoco-maven-plugin.version>
@@ -141,13 +141,13 @@
         <maven-war-plugin.version>3.3.1</maven-war-plugin.version>
         <versions-maven-plugin.version>2.8.1</versions-maven-plugin.version>
         <!-- Dependency versions -->
-        <dependency.checkstyle.version>8.43</dependency.checkstyle.version>
+        <dependency.checkstyle.version>8.44</dependency.checkstyle.version>
         <dependency.jts-version.version>1.18.1</dependency.jts-version.version>
-        <dependency.logback.version>1.2.3</dependency.logback.version>
-        <dependency.postgresql-jdbc.version>42.2.22</dependency.postgresql-jdbc.version>
-        <dependency.slfj.version>1.7.31</dependency.slfj.version>
+        <dependency.logback.version>1.2.4</dependency.logback.version>
+        <dependency.postgresql-jdbc.version>42.2.23</dependency.postgresql-jdbc.version>
+        <dependency.slfj.version>1.7.32</dependency.slfj.version>
         <dependency.spatial4j.version>0.8</dependency.spatial4j.version>
-        <dependency.testcontainers.version>1.15.3</dependency.testcontainers.version>
+        <dependency.testcontainers.version>1.16.0</dependency.testcontainers.version>
         <dependency.testng.version>6.14.3</dependency.testng.version>
     </properties>