diff --git a/CMakeLists.txt b/CMakeLists.txt
index 24490199e..c51043c3f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -404,11 +404,11 @@ set(GNSSSDR_ABSEIL_MIN_VERSION "20240116")
 ################################################################################
 # Versions to download and build (but not to install system-wide) if not found
 ################################################################################
-set(GNSSSDR_ARMADILLO_LOCAL_VERSION "15.4.x")
+set(GNSSSDR_ARMADILLO_LOCAL_VERSION "15.6.x")
 set(GNSSSDR_GFLAGS_LOCAL_VERSION "2.3.1")
 set(GNSSSDR_GLOG_LOCAL_VERSION "0.7.1")
 set(GNSSSDR_MATIO_LOCAL_VERSION "1.6.0")
-set(GNSSSDR_PROTOCOLBUFFERS_LOCAL_VERSION "36.1")
+set(GNSSSDR_PROTOCOLBUFFERS_LOCAL_VERSION "36.2")
 set(GNSSSDR_PUGIXML_LOCAL_VERSION "1.16")
 set(GNSSSDR_GTEST_LOCAL_VERSION "1.18.0")
 set(GNSSSDR_GNSS_SIM_LOCAL_VERSION "origin/master")
diff --git a/README.md b/README.md
index 264e78f8f..07cc66c01 100644
--- a/README.md
+++ b/README.md
@@ -319,9 +319,9 @@ $ sudo apt install libblas-dev liblapack-dev       # For Debian/Ubuntu/LinuxMint
 $ sudo yum install lapack-devel blas-devel         # For Fedora/RHEL
 $ sudo zypper install lapack-devel blas-devel      # For OpenSUSE
 $ sudo pacman -S blas lapack                       # For Arch Linux
-$ wget https://sourceforge.net/projects/arma/files/armadillo-15.4.0.tar.xz
-$ tar xvfz armadillo-15.4.0.tar.xz
-$ cd armadillo-15.4.0
+$ wget https://sourceforge.net/projects/arma/files/armadillo-15.6.0.tar.xz
+$ tar xvfz armadillo-15.6.0.tar.xz
+$ cd armadillo-15.6.0
 $ cmake .
 $ make
 $ sudo make install