diff --git a/.copr/Makefile b/.copr/Makefile
index 657a95f..1385029 100644
--- a/.copr/Makefile
+++ b/.copr/Makefile
@@ -16,11 +16,12 @@ $(info Launching COPR build from directory: $(COPR_CURRENT_SUBDIRECTORY))
 #
 # This Makefile is currently invoked twice:
 # 1) from "collector" subdirectory; test by running
-#        cd /home/fmontorsi/git/cmonitor/collector
-#        make -f /home/fmontorsi/git/cmonitor/.copr/Makefile srpm outdir=/tmp/cmonitor-collector-rpm
+#        export BASE_DIR=/home/fmontorsi/git     (adjust to your case)
+#        cd ${BASEDIR}/cmonitor/collector
+#        make -f ${BASEDIR}/cmonitor/.copr/Makefile srpm outdir=/tmp/cmonitor-collector-rpm
 # 2) from "tools" subdirectory; test by running
-#        cd /home/fmontorsi/git/cmonitor/tools
-#        make -f /home/fmontorsi/git/cmonitor/.copr/Makefile srpm outdir=/tmp/cmonitor-tools-rpm
+#        cd ${BASEDIR}/cmonitor/tools
+#        make -f ${BASEDIR}/cmonitor/.copr/Makefile srpm outdir=/tmp/cmonitor-tools-rpm
 #
 # NOTE: 
 # see https://docs.pagure.org/copr.copr/user_documentation.html#how-long-do-you-keep-the-builds
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 2015317..5a70903 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -15,16 +15,14 @@ jobs:
     - uses: actions/checkout@v4
     - name: install debian-packaged dependencies
       run: sudo apt install -y libgtest-dev libbenchmark-dev libfmt-dev tidy git python3 python3-dateutil python3-pip
-
-    # NOTE: prometheus-cpp & its dependencies wants at least Conan 1.51.0
     - name: install pypi-packaged dependencies
-      run: sudo pip3 install pytest 'black==22.8.0' 'conan==1.60.2'
+      run: sudo pip3 install pytest 'black==22.8.0' 'conan==2.9.1'
 
     # NOTE: since we later run "make" using the normal "builder" user, we must use Conan using that same user (so avoid the "sudo"!!)
     - name: install Conan-packaged dependencies
       run: |
-         conan profile new default --detect
-         conan profile update settings.compiler.libcxx=libstdc++11 default
+         conan profile detect --force
+         conan remote update conancenter --url https://center2.conan.io
          conan install conanfile.txt --build=missing
 
     # build & test
diff --git a/.gitignore b/.gitignore
index 0b9ae5a..a739a21 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,3 +53,11 @@ conanbuildinfo.txt
 conaninfo.txt
 graph_info.json
 
+# files created by Conan v2 install
+conanbuild.sh
+conanbuildenv-release-x86_64.sh
+conandeps.mk
+conanrun.sh
+conanrunenv-release-x86_64.sh
+deactivate_conanbuild.sh
+deactivate_conanrun.sh
diff --git a/Makefile b/Makefile
index 56aeedc..5e31f57 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 #
 # Main makefile for cmonitor project
 # https://github.com/f18m/cmonitor
-# Francesco Montorsi (c) 2019
+# Francesco Montorsi (c) 2019-2024
 #
 
 # constants
diff --git a/Prometheus-Support.mk b/Prometheus-Support.mk
index c21410b..2e028c2 100644
--- a/Prometheus-Support.mk
+++ b/Prometheus-Support.mk
@@ -8,15 +8,15 @@ ifeq ($(PROMETHEUS_SUPPORT),1)
 
 $(info INFO: Prometheus support is ENABLED)
 
-ifeq ($(wildcard $(ROOT_DIR)/conanbuildinfo.mak),)
+ifeq ($(wildcard $(ROOT_DIR)/conandeps.mk),)
 $(error Please run 'conan install . --build=missing' first)
 endif
 
 # include prometheus-cpp depedency through the GNU make variables provided by Conan at install time
 # NOTE: for some reason "dl pthread" libraries must be explicitly listed
-include $(ROOT_DIR)/conanbuildinfo.mak
+include $(ROOT_DIR)/conandeps.mk
 LIBS += $(foreach libdir,$(CONAN_LIB_DIRS),-L$(libdir)) $(foreach lib,$(CONAN_LIBS),-l$(lib)) -ldl -lpthread
-CXXFLAGS += $(CONAN_CXXFLAGS) -I$(CONAN_INCLUDE_DIRS_PROMETHEUS-CPP)
+CXXFLAGS += $(CONAN_CXXFLAGS) -I$(CONAN_INCLUDE_DIRS_PROMETHEUS_CPP)
 DEFS += -DPROMETHEUS_SUPPORT=1
 else
 
diff --git a/collector/spec/collector.spec b/collector/spec/collector.spec
index f635e2b..310ede6 100644
--- a/collector/spec/collector.spec
+++ b/collector/spec/collector.spec
@@ -43,13 +43,13 @@ echo "[Inside RPM prep] running setup"
 %build
 # first of all install in the buildroot the Conan package manager, which we use to fetch
 # prometheus-cpp, since that library is not, unfortunately, packaged by Fedora/COPR
-# NOTE: prometheus-cpp & its dependencies wants at least Conan 1.51.0
+# NOTE: prometheus-cpp & its dependencies want at least Conan 1.51.0... but versions below 1.64 fail to 
+#       install properly in Fedora >= 39
 echo "[Inside RPM build] installing Conan"
-pip3 install --user 'conan==1.60.2' 
+pip3 install --user 'conan==2.9.1' 
 echo "[Inside RPM build] bootstrapping Conan"
 export PATH="$HOME/.local/bin:$PATH"
-conan profile new %{buildroot}/cmonitor_rpmbuild --detect 
-conan profile update settings.compiler.libcxx=libstdc++11 %{buildroot}/cmonitor_rpmbuild
+conan profile detect --force
 conan remote list
 
 # secondly, Conan is used to fetch prometheus-cpp library, building it with cmake when needed:
@@ -59,8 +59,9 @@ echo "[Inside RPM build] installing prometheus-cpp"
 mkdir -p %{buildroot}/bin
 ln -sf /usr/bin/cmake3 %{buildroot}/bin/cmake
 export PATH="%{buildroot}/bin:$PATH"
+
 echo "[Inside RPM build] the PATH adjusted to contain a cmake3->cmake symlink is: $PATH"
-conan install conanfile.txt --build=missing --profile %{buildroot}/cmonitor_rpmbuild
+conan install conanfile.txt --build=missing
 
 # finally, this command invokes the root Makefile of cmonitor repo, from inside the source tarball
 # produced by COPR; that root Makefile will pass all the options listed here to collector/Makefile
diff --git a/collector/src/Makefile b/collector/src/Makefile
index d4595cd..9f69b97 100644
--- a/collector/src/Makefile
+++ b/collector/src/Makefile
@@ -7,11 +7,9 @@ ROOT_DIR:=$(shell readlink -f $(THIS_DIR)/../..)
 include $(ROOT_DIR)/Constants.mk
 include $(ROOT_DIR)/Prometheus-Support.mk
 
-# IMPORTANT: Centos7 which is one of the oldest-supported distributions provides gcc 4.8.5;
-#            GCC 4.8.x is able to build C++11 but not e.g. C++14/17/20 yet... so we will stay with C++11
-#            till Centos7 has to be supported...
+
 # IMPORTANT#2: -fPIC is required to build on fedora-rawhide
-CXXFLAGS += -Wall -Werror -Wno-switch-bool -std=c++11 -fPIC $(DEFS)
+CXXFLAGS += -Wall -Werror -Wno-switch-bool -std=c++14 -fPIC $(DEFS)
 
 ifeq ($(DEBUG),1)
 CXXFLAGS += -g -O0   #useful for debugging
@@ -92,7 +90,7 @@ benchmarks:
 
 
 $(OUT): $(OBJS) $(ROOT_DIR)/Constants.mk
-	$(CXX) $(LDFLAGS) -o $(OUT) $(OBJS) $(LIBS)
+	$(CXX) $(LDFLAGS) -o $(OUT) $(OBJS) -Wl,--start-group $(LIBS) -Wl,--end-group
 
 clean:
 	rm -f $(OUT) $(OBJS) *.err *.json *.log
diff --git a/collector/src/benchmarks/Makefile b/collector/src/benchmarks/Makefile
index e1a3a99..64fd009 100644
--- a/collector/src/benchmarks/Makefile
+++ b/collector/src/benchmarks/Makefile
@@ -7,7 +7,7 @@ ROOT_DIR:=$(shell readlink -f $(THIS_DIR)/../../..)
 include $(ROOT_DIR)/Constants.mk
 include $(ROOT_DIR)/Prometheus-Support.mk
 
-CXXFLAGS=-Wall -Werror -Wno-switch-bool -std=c++11 -fPIC $(DEFS)
+CXXFLAGS=-Wall -Werror -Wno-switch-bool -std=c++14 -fPIC $(DEFS)
 
 ifeq ($(DEBUG),1)
 CXXFLAGS += -g -O0    #useful for debugging
@@ -75,7 +75,7 @@ debug:
 	gdb $(OUT)
 
 $(OUT): $(OBJS) $(ROOT_DIR)/Constants.mk
-	$(CXX) $(LDFLAGS) -o $(OUT) $(OBJS) $(LIBS)
+	$(CXX) $(LDFLAGS) -o $(OUT) $(OBJS) -Wl,--start-group $(LIBS) -Wl,--end-group
 
 clean:
 	rm -f $(OUT) $(OBJS) 
diff --git a/collector/src/tests/Makefile b/collector/src/tests/Makefile
index d887f24..883b5b3 100644
--- a/collector/src/tests/Makefile
+++ b/collector/src/tests/Makefile
@@ -7,7 +7,7 @@ ROOT_DIR:=$(shell readlink -f $(THIS_DIR)/../../..)
 include $(ROOT_DIR)/Constants.mk
 include $(ROOT_DIR)/Prometheus-Support.mk
 
-CXXFLAGS += -Wall -Werror -Wno-switch-bool -std=c++11 -fPIC $(DEFS)
+CXXFLAGS += -Wall -Werror -Wno-switch-bool -std=c++14 -fPIC $(DEFS)
 
 ifeq ($(DEBUG),1)
 CXXFLAGS += -g -O0   #useful for debugging
@@ -88,7 +88,7 @@ accept_new_results:
 	done
 
 $(OUT): $(OBJS) $(ROOT_DIR)/Constants.mk
-	$(CXX) $(LDFLAGS) -o $(OUT) $(OBJS) $(LIBS)
+	$(CXX) $(LDFLAGS) -o $(OUT) $(OBJS) -Wl,--start-group $(LIBS) -Wl,--end-group
 
 clean:
 	rm -f $(OUT) $(OBJS) *.err *.json *.log
diff --git a/collector/src/tests/tests_cgroup.cpp b/collector/src/tests/tests_cgroup.cpp
index 155e7d8..6615773 100644
--- a/collector/src/tests/tests_cgroup.cpp
+++ b/collector/src/tests/tests_cgroup.cpp
@@ -16,7 +16,9 @@
 // GTest helpers
 //------------------------------------------------------------------------------
 
+#ifndef PATH_MAX
 #define PATH_MAX (4096)
+#endif
 
 std::string get_unit_test_abs_dir()
 {
diff --git a/conanfile.txt b/conanfile.txt
index b360418..202ee22 100644
--- a/conanfile.txt
+++ b/conanfile.txt
@@ -1,20 +1,18 @@
 #
-# Conanfile to retrieve prometheus-cpp library (and its dependencies: civetweb, openssl, libcurl)
+# Conanfile to retrieve prometheus-cpp library (and its dependencies/*: civetweb, openssl, libcurl)
 # This Conanfile is used also by COPR during RPM creation.
 #
 
 [requires]
-  # prometheus-cpp 1.1.0 cannot be used because it supports only C++14 onward; however the compiler shipping with Centos7
-  # supports at most the C++11 dialect... so till we want to support Centos7, we need to stick with prometheus-cpp 1.0.0
-  prometheus-cpp/1.2.4@
+  prometheus-cpp/1.3.0@
 
 [options]
   # by using shared=False we create a cmonitor_collector binary that is self-contained
-  prometheus-cpp:shared=False                    # default is True
-  prometheus-cpp:with_pull=True                  # default is True 
-  prometheus-cpp:with_push=False                 # default is False 
-  prometheus-cpp:with_compression=False          # default is False
-  prometheus-cpp:fPIC=True                       # default is True
+  prometheus-cpp/*:shared=False                    # default is True
+  prometheus-cpp/*:with_pull=True                  # default is True 
+  prometheus-cpp/*:with_push=False                 # default is False 
+  prometheus-cpp/*:with_compression=False          # default is False
+  prometheus-cpp/*:fPIC=True                       # default is True
 
 [generators]
-  make
+  MakeDeps