diff --git a/all-spark-notebook/Dockerfile b/all-spark-notebook/Dockerfile
index 3d8a6652..8740ff60 100644
--- a/all-spark-notebook/Dockerfile
+++ b/all-spark-notebook/Dockerfile
@@ -23,9 +23,9 @@ USER ${NB_UID}
 
 # R packages including IRKernel which gets installed globally.
 RUN mamba install --quiet --yes \
-    'r-base=4.0.3' \
+    'r-base=4.0.5' \
     'r-ggplot2=3.3*' \
-    'r-irkernel=1.1*' \
+    'r-irkernel=1.2*' \
     'r-rcurl=1.98*' \
     'r-sparklyr=1.6*' && \
     mamba clean --all -f -y && \
diff --git a/base-notebook/Dockerfile b/base-notebook/Dockerfile
index 14a2c954..7524c241 100644
--- a/base-notebook/Dockerfile
+++ b/base-notebook/Dockerfile
@@ -26,7 +26,7 @@ USER root
 # Conda version
 ARG conda_version="4.10.1"
 # Miniforge installer patch version
-ARG miniforge_patch_number="0"
+ARG miniforge_patch_number="4"
 # Miniforge installer architecture
 ARG miniforge_arch="x86_64"
 # Package Manager and Python implementation to use (https://github.com/conda-forge/miniforge)
@@ -39,7 +39,7 @@ ARG miniforge_version="${conda_version}-${miniforge_patch_number}"
 # Miniforge installer
 ARG miniforge_installer="${miniforge_python}-${miniforge_version}-Linux-${miniforge_arch}.sh"
 # Miniforge checksum
-ARG miniforge_checksum="d4065b376f81b83cfef0c7316f97bb83337e4ae27eb988828363a578226e3a62"
+ARG miniforge_checksum="9eb335cb559644a6e462c077ebc129af51b7329817574fb707b994dafdddf2af"
 
 # Install all OS dependencies for notebook server that starts but lacks all
 # features (e.g., download as all possible file formats)
diff --git a/datascience-notebook/Dockerfile b/datascience-notebook/Dockerfile
index 70869746..012ac71d 100644
--- a/datascience-notebook/Dockerfile
+++ b/datascience-notebook/Dockerfile
@@ -54,7 +54,7 @@ USER ${NB_UID}
 
 # R packages including IRKernel which gets installed globally.
 RUN conda install --quiet --yes \
-    'r-base=4.0.3'  \
+    'r-base=4.0.5' \
     'r-caret=6.0*' \
     'r-crayon=1.4*' \
     'r-devtools=2.4*' \
@@ -62,11 +62,11 @@ RUN conda install --quiet --yes \
     'r-hexbin=1.28*' \
     'r-htmltools=0.5*' \
     'r-htmlwidgets=1.5*' \
-    'r-irkernel=1.1*' \
+    'r-irkernel=1.2*' \
     'r-nycflights13=1.0*' \
     'r-randomforest=4.6*' \
     'r-rcurl=1.98*' \
-    'r-rmarkdown=2.7*' \
+    'r-rmarkdown=2.8*' \
     'r-rodbc=1.3*' \
     'r-rsqlite=2.2*' \
     'r-shiny=1.6*' \
diff --git a/r-notebook/Dockerfile b/r-notebook/Dockerfile
index 38c54138..40f6687c 100644
--- a/r-notebook/Dockerfile
+++ b/r-notebook/Dockerfile
@@ -25,7 +25,7 @@ USER ${NB_UID}
 
 # R packages including IRKernel which gets installed globally.
 RUN conda install --quiet --yes \
-    'r-base=4.0.3' \
+    'r-base=4.0.5' \
     'r-caret=6.*' \
     'r-crayon=1.4*' \
     'r-devtools=2.4*' \
@@ -33,11 +33,11 @@ RUN conda install --quiet --yes \
     'r-hexbin=1.28*' \
     'r-htmltools=0.5*' \
     'r-htmlwidgets=1.5*' \
-    'r-irkernel=1.1*' \
+    'r-irkernel=1.2*' \
     'r-nycflights13=1.0*' \
     'r-randomforest=4.6*' \
     'r-rcurl=1.98*' \
-    'r-rmarkdown=2.7*' \
+    'r-rmarkdown=2.8*' \
     'r-rodbc=1.3*' \
     'r-rsqlite=2.2*' \
     'r-shiny=1.6*' \
diff --git a/scipy-notebook/Dockerfile b/scipy-notebook/Dockerfile
index 94490cc4..d91529d8 100644
--- a/scipy-notebook/Dockerfile
+++ b/scipy-notebook/Dockerfile
@@ -23,7 +23,7 @@ RUN conda install --quiet --yes \
     'cloudpickle=1.6.*' \
     'conda-forge::blas=*=openblas' \
     'cython=0.29.*' \
-    'dask=2021.4.*' \
+    'dask=2021.5.*' \
     'dill=0.3.*' \
     'h5py=3.2.*' \
     'ipympl=0.7.*'\
@@ -33,7 +33,7 @@ RUN conda install --quiet --yes \
     'numexpr=2.7.*' \
     'pandas=1.2.*' \
     'patsy=0.5.*' \
-    'protobuf=3.15.*' \
+    'protobuf=3.17.*' \
     'pytables=3.6.*' \
     'scikit-image=0.18.*' \
     'scikit-learn=0.24.*' \