diff --git a/.github/actions/install-dependencies/action.yml b/.github/actions/install-dependencies/action.yml
index 6a52a55..78ce4d8 100644
--- a/.github/actions/install-dependencies/action.yml
+++ b/.github/actions/install-dependencies/action.yml
@@ -14,7 +14,7 @@ runs:
       run: echo "OPENTELEMETRY_CPP_VERSION=${OPENTELEMETRY_CPP_VERSION}" >> "${GITHUB_ENV}"
       env:
         # renovate: datasource=github-releases depName=open-telemetry/opentelemetry-cpp
-        OPENTELEMETRY_CPP_VERSION: v1.22.0
+        OPENTELEMETRY_CPP_VERSION: v1.23.0
 
     - name: Make /usr/local/include and /usr/local/lib writable
       shell: bash
diff --git a/Dockerfile b/Dockerfile
index 359d0d5..211f8e8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ ENV CC=clang-18
 WORKDIR /build
 
 # renovate: datasource=github-releases depName=open-telemetry/opentelemetry-cpp
-ENV OPENTELEMETRY_CPP_VERSION=v1.22.0
+ENV OPENTELEMETRY_CPP_VERSION=v1.23.0
 RUN \
     git clone https://github.com/open-telemetry/opentelemetry-cpp.git \
         --depth=1 -b "${OPENTELEMETRY_CPP_VERSION}" --single-branch && \
diff --git a/src/os_utils.cpp b/src/os_utils.cpp
index c4634a7..4c03fb6 100644
--- a/src/os_utils.cpp
+++ b/src/os_utils.cpp
@@ -93,7 +93,11 @@ std::string get_os_type(std::string_view os)
         std::pair{"NetBSD"sv, kNetbsd},
         std::pair{"OpenBSD"sv, kOpenbsd},
         std::pair{"SunOS"sv, kSolaris},
+#if OPENTELEMETRY_VERSION_MAJOR == 1 && OPENTELEMETRY_VERSION_MINOR < 22
         std::pair{"OS/390"sv, kZOs}
+#else
+        std::pair{"OS/390"sv, kZos}
+#endif
     };
 
 #ifdef USE_MPH
diff --git a/test/os_utils/get_os_type.cpp b/test/os_utils/get_os_type.cpp
index 9f034cf..99a27a0 100644
--- a/test/os_utils/get_os_type.cpp
+++ b/test/os_utils/get_os_type.cpp
@@ -30,6 +30,12 @@ TEST_P(GetOsTypeTest, get_os_type)
     EXPECT_EQ(actual, expected);
 }
 
+#if OPENTELEMETRY_VERSION_MAJOR == 1 && OPENTELEMETRY_VERSION_MINOR < 22
+static constexpr const char* z_os = kZOs;
+#else
+static constexpr const char* z_os = kZos;
+#endif
+
 INSTANTIATE_TEST_SUITE_P(
     Table,
     GetOsTypeTest,
@@ -52,7 +58,7 @@ INSTANTIATE_TEST_SUITE_P(
         std::make_tuple("NetBSD", kNetbsd),
         std::make_tuple("OpenBSD", kOpenbsd),
         std::make_tuple("SunOS", kSolaris),
-        std::make_tuple("OS/390", kZOs),
+        std::make_tuple("OS/390", z_os),
         std::make_tuple("UNKNOWN", "UNKNOWN")
     )
 );