diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24e69496..131c078b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Changed
+
+- Update minimum Fortran compiler versions
+  - Intel 18.0.5
+  - GNU 9.2.0
+  - NAG 7.0
+
 ### Fixed
 ### Removed
 ### Added
diff --git a/compiler/flags/GNU_Fortran.cmake b/compiler/flags/GNU_Fortran.cmake
index 554a2232..4d7c5c3c 100644
--- a/compiler/flags/GNU_Fortran.cmake
+++ b/compiler/flags/GNU_Fortran.cmake
@@ -1,5 +1,5 @@
-if (CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 8.3)
-  message(FATAL_ERROR "${CMAKE_Fortran_COMPILER_ID} version must be at least 8.3!")
+if (CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 9.2)
+  message(FATAL_ERROR "${CMAKE_Fortran_COMPILER_ID} version must be at least 9.2!")
 endif()
 
 set (FOPT0 "-O0")
diff --git a/compiler/flags/Intel_Fortran.cmake b/compiler/flags/Intel_Fortran.cmake
index 2ce35707..06bf4cf5 100644
--- a/compiler/flags/Intel_Fortran.cmake
+++ b/compiler/flags/Intel_Fortran.cmake
@@ -1,5 +1,5 @@
-if (CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 15.1)
-  message(FATAL_ERROR "${CMAKE_Fortran_COMPILER_ID} version must be at least 15.1!")
+if (CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 18.0.5)
+  message(FATAL_ERROR "${CMAKE_Fortran_COMPILER_ID} version must be at least 18.0.5!")
 endif()
 
 set (FOPT0 "-O0")
diff --git a/compiler/flags/NAG_Fortran.cmake b/compiler/flags/NAG_Fortran.cmake
index 5e1a3c89..d096d0b7 100644
--- a/compiler/flags/NAG_Fortran.cmake
+++ b/compiler/flags/NAG_Fortran.cmake
@@ -1,5 +1,5 @@
-if (CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 6.0)
-  message(FATAL_ERROR "${CMAKE_Fortran_COMPILER_ID} version must be at least 6.0!")
+if (CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 7.0)
+  message(FATAL_ERROR "${CMAKE_Fortran_COMPILER_ID} version must be at least 7.0!")
 endif()
 
 set (FREAL8 "-r8")