diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2e79d77..d2b84ba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 project(Cnomicon)
 set(CMAKE_INSTALL_PREFIX /usr/local/cnomicon)
 
diff --git a/apps/CMakeLists.txt b/apps/CMakeLists.txt
index a790793..2117934 100644
--- a/apps/CMakeLists.txt
+++ b/apps/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 project(Cnomicon)
 
 # list of header files
diff --git a/daemons/CMakeLists.txt b/daemons/CMakeLists.txt
index 0f388ab..e828e4d 100644
--- a/daemons/CMakeLists.txt
+++ b/daemons/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 project(Cnomicon)
 set(CMAKE_INSTALL_PREFIX ../bin)
 
diff --git a/daemons/cand/CMakeLists.txt b/daemons/cand/CMakeLists.txt
index 715433a..1ab12b0 100644
--- a/daemons/cand/CMakeLists.txt
+++ b/daemons/cand/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME cand)
 project(Cnomicon-Daemon)
 set(TARGET ${NAME})
diff --git a/daemons/gpsd/CMakeLists.txt b/daemons/gpsd/CMakeLists.txt
index f3d730f..467c85a 100644
--- a/daemons/gpsd/CMakeLists.txt
+++ b/daemons/gpsd/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME gpsd)
 project(Cnomicon-Daemon)
 set(TARGET ${NAME})
diff --git a/daemons/logd/CMakeLists.txt b/daemons/logd/CMakeLists.txt
index 5176f0c..cfef3ae 100644
--- a/daemons/logd/CMakeLists.txt
+++ b/daemons/logd/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME logd)
 project(Cnomicon-Daemon)
 set(TARGET ${NAME})
diff --git a/daemons/rtcmd/CMakeLists.txt b/daemons/rtcmd/CMakeLists.txt
index 014ac52..b26d6b9 100644
--- a/daemons/rtcmd/CMakeLists.txt
+++ b/daemons/rtcmd/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME rtcmd)
 project(Cnomicon-Daemon)
 set(TARGET ${NAME})
diff --git a/daemons/seriald/CMakeLists.txt b/daemons/seriald/CMakeLists.txt
index c2f3c10..24324c6 100644
--- a/daemons/seriald/CMakeLists.txt
+++ b/daemons/seriald/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME seriald)
 project(Cnomicon-Daemon)
 set(TARGET ${NAME})
diff --git a/daemons/stdiod/CMakeLists.txt b/daemons/stdiod/CMakeLists.txt
index 3cce37d..9589f35 100644
--- a/daemons/stdiod/CMakeLists.txt
+++ b/daemons/stdiod/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME stdiod)
 project(Cnomicon-Daemon)
 set(TARGET ${NAME})
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 54280c9..793a321 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 project(Cnomicon)
 set(CMAKE_INSTALL_PREFIX .)
 
diff --git a/src/libasn1/CMakeLists.txt b/src/libasn1/CMakeLists.txt
index 835f04f..767e03d 100644
--- a/src/libasn1/CMakeLists.txt
+++ b/src/libasn1/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME asn1)
 set(TARGET lib${NAME})
 project(Cnomicon-${TARGET})
diff --git a/src/libcan++/CMakeLists.txt b/src/libcan++/CMakeLists.txt
index 0e04b21..b07d2f2 100644
--- a/src/libcan++/CMakeLists.txt
+++ b/src/libcan++/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME can++)
 set(TARGET lib${NAME})
 project(Cnomicon-${TARGET})
diff --git a/src/libemb/CMakeLists.txt b/src/libemb/CMakeLists.txt
index 8f17db4..4933611 100644
--- a/src/libemb/CMakeLists.txt
+++ b/src/libemb/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME emb)
 set(TARGET lib${NAME})
 project(Cnomicon-${TARGET})
diff --git a/src/libgps++/CMakeLists.txt b/src/libgps++/CMakeLists.txt
index 7d4d70a..27cfbe6 100644
--- a/src/libgps++/CMakeLists.txt
+++ b/src/libgps++/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME gps++)
 set(TARGET lib${NAME})
 project(Cnomicon-${TARGET})
diff --git a/src/libnet++/CMakeLists.txt b/src/libnet++/CMakeLists.txt
index d9c6d3e..43c33ac 100644
--- a/src/libnet++/CMakeLists.txt
+++ b/src/libnet++/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME net++)
 set(TARGET lib${NAME})
 project(Cnomicon-${TARGET})
diff --git a/src/libnet/CMakeLists.txt b/src/libnet/CMakeLists.txt
index 15e89cc..57b4f21 100644
--- a/src/libnet/CMakeLists.txt
+++ b/src/libnet/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME net)
 set(TARGET lib${NAME})
 project(Cnomicon-${TARGET})
diff --git a/src/libutil/CMakeLists.txt b/src/libutil/CMakeLists.txt
index 3ed818d..faea5fa 100644
--- a/src/libutil/CMakeLists.txt
+++ b/src/libutil/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME util)
 set(TARGET lib${NAME})
 project(Cnomicon-${TARGET})
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index f455183..bea6273 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 project(Cnomicon)
 
 # list of header files
diff --git a/tests/gps/CMakeLists.txt b/tests/gps/CMakeLists.txt
index c43e81d..3ac7372 100644
--- a/tests/gps/CMakeLists.txt
+++ b/tests/gps/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME gps)
 project(Cnomicon-Test)
 set(TARGET ${NAME}_test)
diff --git a/tests/nmea/CMakeLists.txt b/tests/nmea/CMakeLists.txt
index 13b4f05..6f83713 100644
--- a/tests/nmea/CMakeLists.txt
+++ b/tests/nmea/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.20)
 set(NAME nmea)
 project(Cnomicon-Test)
 set(TARGET ${NAME}_test)
diff --git a/tests/uri/CMakeLists.txt b/tests/uri/CMakeLists.txt
index a27eb10..05e1ca8 100644
--- a/tests/uri/CMakeLists.txt
+++ b/tests/uri/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 set(NAME uri)
 project(Cnomicon-Test)
 set(TARGET ${NAME}_test)
diff --git a/utils/CMakeLists.txt b/utils/CMakeLists.txt
index fe2f6b9..69be591 100644
--- a/utils/CMakeLists.txt
+++ b/utils/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.20)
 project(Cnomicon)
 
 # list of header files