diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2084d6b8..a80ddea5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,6 +34,7 @@ jobs:
     strategy:
       matrix:
         build_config:
+          - { version: 22 }
           - { version: 21 }
           - { version: 20 }
           - { version: 19 }
diff --git a/conanfile.txt b/conanfile.txt
index a37f52b2..6bc2c8ff 100644
--- a/conanfile.txt
+++ b/conanfile.txt
@@ -1,5 +1,5 @@
 [requires]
-doctest/2.4.11
+doctest/2.4.12
 
 [generators]
 CMakeToolchain
diff --git a/script/ci.sh b/script/ci.sh
index a5934ac8..d0943190 100755
--- a/script/ci.sh
+++ b/script/ci.sh
@@ -28,7 +28,7 @@ fi
 # Function to install doctest
 _install_doctest() {
     cd "$REPO_DIR"
-    git clone --depth=1 --branch=v2.4.12 https://github.com/doctest/doctest
+    git clone --depth=1 --branch=v2.5.0 https://github.com/doctest/doctest
     cd doctest && mkdir -p build && cd build
     cmake .. -DDOCTEST_WITH_TESTS=OFF -DDOCTEST_WITH_MAIN_IN_STATIC_LIB=OFF -DCMAKE_INSTALL_PREFIX=$INSTALL_PREFIX
     cmake --build . --config Release --target install
diff --git a/test/udemy_course_test.cpp b/test/udemy_course_test.cpp
index e75ff66e..4ab3ca02 100644
--- a/test/udemy_course_test.cpp
+++ b/test/udemy_course_test.cpp
@@ -291,18 +291,18 @@ TEST_CASE("udemy_course_test - Function_composition")
 }
 
 namespace Programming_challenge_an_SQL_analogy {
-struct user {
+struct User {
     std::string name;
     std::string country;
     std::size_t visits;
 };
 
-std::string get_country(const user& u)
+std::string get_country(const User& u)
 {
     return u.country;
 }
 
-std::size_t get_visits(const user& u)
+std::size_t get_visits(const User& u)
 {
     return u.visits;
 }
@@ -312,7 +312,7 @@ TEST_CASE("udemy_course_test - Programming_challenge_an_SQL_analogy")
 {
     using namespace Programming_challenge_an_SQL_analogy;
 
-    const std::vector<user> users = {
+    const std::vector<User> users = {
         { "Nicole", "GER", 2 },
         { "Justin", "USA", 1 },
         { "Rachel", "USA", 5 },
@@ -320,7 +320,7 @@ TEST_CASE("udemy_course_test - Programming_challenge_an_SQL_analogy")
         { "Stefan", "GER", 4 }
     };
 
-    const auto visit_sum = [](const std::vector<user>& xs) -> std::size_t {
+    const auto visit_sum = [](const std::vector<User>& xs) -> std::size_t {
         return fplus::fwd::apply(xs, fplus::fwd::transform(get_visits), fplus::fwd::sum());
     };
 
@@ -489,4 +489,4 @@ TEST_CASE("udemy_course_test - OOP_Design_patterns_vanishing")
 
     REQUIRE_EQ(a, 16);
     REQUIRE_EQ(b, 25);
-}
\ No newline at end of file
+}