diff --git a/Jenkinsfile b/Jenkinsfile
index 0f2f9757fdbb543172c202d8321e7cbffee4f0a2..a55df134edcb0a4b738aa389d8952dfb2b708d1b 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -558,7 +558,7 @@ pipeline {
                 cmakeOptions =
                   "-DBUILD_SHARED_LIBS=${build_shared} " +
                   '-DBUILD_TESTING=OFF ' +
-                  '-DCMAKE_CXX_CLANG_TIDY=clang-tidy-8 '
+                  '-DCMAKE_CXX_CLANG_TIDY=clang-tidy-9 '
               }
               build { log = 'build.log' }
             }
diff --git a/web/data/versions.json b/web/data/versions.json
index 5e54452044a499fe6af9015c6642587a4a064ca0..79563e9cbe903f83655247d00b07d5e0aeb17607 100644
--- a/web/data/versions.json
+++ b/web/data/versions.json
@@ -1,7 +1,7 @@
 {
   "minimum_version": {
     "gcc": "8.0",
-    "clang": "3.5",
+    "clang": "9.0",
     "msvc": {
       "year": "2019",
       "number": "16",