diff --git a/corretto-emr-dbs-universal-base/Dockerfile b/corretto-emr-dbs-universal-base/Dockerfile
index d27abcf..126a5af 100644
--- a/corretto-emr-dbs-universal-base/Dockerfile
+++ b/corretto-emr-dbs-universal-base/Dockerfile
@@ -1,7 +1,7 @@
 #
 # Source: https://github.com/data-engineering-helpers/dpp-images/tree/main/pyspark-coretto-emr-dbs-universal-base/Dockerfile
 # On Docker Hub: https://hub.docker.com/repository/docker/infrahelpers/dpp/general
-# Convention for the  tags of the generated images:
+# Convention for the tags of the generated images:
 # * infrahelpers/dpp:jdk{JDK_VERSION} e.g.:
 #  * infrahelpers/dpp:jdk8
 #  * infrahelpers/dpp:jdk11
@@ -17,7 +17,7 @@
 # (see the pyspark-py3X/ directories), with specific versions.
 # Note that:
 # * DataBricks uses Python 3.8 internally by default
-# * AWS EMR uses Python 3.7.10 by default
+# * AWS EMR uses Python 3.7.16 by default
 #
 # AWS Corretto / EMR
 # ==================
diff --git a/corretto-emr-dbs-universal-pyspark/Dockerfile b/corretto-emr-dbs-universal-pyspark/Dockerfile
index 9d3fefc..d892c77 100644
--- a/corretto-emr-dbs-universal-pyspark/Dockerfile
+++ b/corretto-emr-dbs-universal-pyspark/Dockerfile
@@ -1,11 +1,11 @@
 #
-# Source: https://github.com/data-engineering-helpers/dpp-images/tree/main/pyspark-py310/Dockerfile
+# Source: https://github.com/data-engineering-helpers/dpp-images/tree/main/corretto-emr-dbs-universal-pyspark/Dockerfile
 # On Docker Hub: https://hub.docker.com/repository/docker/infrahelpers/dpp/general
 # Usual Docker tags:
 # * infrahelpers/dpp:jdk{JDK_VERSION}-python{PYTHON_MINOR_VERSION}
 # * infrahelpers/dpp:jdk{JDK_VERSION}-python{PYTHON_MICRO_VERSION}
 #
-# Image containing python installation, to be accessed by EMR and Databricks (for pyspark)
+# Image containing python installation, to be accessed by EMR and Databricks (for PySpark)
 # See https://github.com/data-engineering-helpers/dpp-images/tree/main/coretto-emr-dbs-universal-base/Dockerfile
 # for more details about the base image (tag: infrahelpers/dpp:jdk{JDK_VERSION})
 #
@@ -28,7 +28,7 @@ ENV PYTHON_MICRO_VERSION=$PYTHON_MICRO_VERSION
 ENV PYSPARK_PYTHON="/databricks/python3/bin/python3"
 
 # Update the OS
-RUN yum -y update && yum clean all
+RUN yum -y update && yum clean all && rm -rf /var/cache/yum
 
 # Install the PYTHON_MICRO_VERSION version of Python
 RUN curl -kLs \
@@ -38,13 +38,14 @@ RUN curl -kLs \
 	rm -f Python-${PYTHON_MICRO_VERSION}.tgz && \
 	cd Python-${PYTHON_MICRO_VERSION} && \
 	./configure --prefix=/usr --enable-optimizations && \
-	make && \
-	make altinstall
+	make && make altinstall && \
+	cd .. && rm -rf Python-${PYTHON_MICRO_VERSION}
 
 # Set the PYTHON_MICRO_VERSION version of Python as system Python
 # This is what is used by AWS EMR
-RUN cp -f /usr/bin/python${PYTHON_MINOR_VERSION} /usr/bin/python3 && \
-	python3 --version
+RUN cd /usr/bin && \
+	rm -f /usr/bin/python3 && ln -s python${PYTHON_MINOR_VERSION} python3 \
+	&& cd .. && python -V && python3 -V
 
 # Install a virtual environment in /databricks/python3
 RUN python3 -mpip install -U pip && python3 -mpip install virtualenv && \
diff --git a/corretto-emr-dbs-universal-spark-scala/Dockerfile b/corretto-emr-dbs-universal-spark-scala/Dockerfile
index 5e77f7f..d97e54f 100644
--- a/corretto-emr-dbs-universal-spark-scala/Dockerfile
+++ b/corretto-emr-dbs-universal-spark-scala/Dockerfile
@@ -1,10 +1,10 @@
 #
-# Source: https://github.com/data-engineering-helpers/dpp-images/tree/main/pyspark-py310/Dockerfile
+# Source: https://github.com/data-engineering-helpers/dpp-images/tree/main/corretto-emr-dbs-universal-spark-scala/Dockerfile
 # On Docker Hub: https://hub.docker.com/repository/docker/infrahelpers/dpp/general
 # Usual Docker tags:
 # * infrahelpers/dpp:jdk8-sbt{SBT_VERSION}
 #
-# Image containing python installation, to be accessed by EMR and Databricks (for spark scala)
+# Image containing python installation, to be accessed by EMR and Databricks (for Spark Scala)
 # See https://github.com/data-engineering-helpers/dpp-images/tree/main/coretto-emr-dbs-universal-base/Dockerfile
 # for more details about the base image (tag: infrahelpers/dpp:jdk{JDK_VERSION})
 #
@@ -12,10 +12,14 @@ FROM infrahelpers/dpp:jdk8
 
 ARG SBT_VERSION
 
-LABEL authors="Antoine Chenon<antoine.chenon@decathlon.com>"
+LABEL authors="Antoine Chenon<antoine.chenon@decathlon.com>, Denis Arnaud <denis.arnaud_fedora@m4x.org>"
 
 # Update the OS
-RUN yum -y update && yum clean all
+RUN yum -y update && yum clean all && rm -rf /var/cache/yum
 
 # Install sbt
-RUN rm -f /etc/yum.repos.d/bintray-rpm.repo; curl -L https://www.scala-sbt.org/sbt-rpm.repo > sbt-rpm.repo; mv sbt-rpm.repo /etc/yum.repos.d/; yum -y install sbt-${SBT_VERSION}-0
\ No newline at end of file
+RUN rm -f /etc/yum.repos.d/bintray-rpm.repo && \
+	curl -kLs https://www.scala-sbt.org/sbt-rpm.repo -o /etc/yum.repos.d/sbt-rpm.repo && \
+	yum -y install sbt-${SBT_VERSION}-0 && \
+	sbt -version
+