diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0f92e092f..7331f0cf6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -165,6 +165,9 @@ add_definitions(-DBOOST_COROUTINES_NO_DEPRECATION_WARNING)
 
 add_definitions(-DBOOST_FILESYSTEM_NO_DEPRECATED)
 
+# Required for Boost v1.74+
+add_definitions(-DBOOST_ASIO_USE_TS_EXECUTOR_AS_DEFAULT)
+
 link_directories(${Boost_LIBRARY_DIRS})
 include_directories(${Boost_INCLUDE_DIRS})
 
diff --git a/lib/base/string.cpp b/lib/base/string.cpp
index c4617e357..eec5b8372 100644
--- a/lib/base/string.cpp
+++ b/lib/base/string.cpp
@@ -127,6 +127,18 @@ String::operator const std::string&() const
 	return m_Data;
 }
 
+/**
+ * Conversion function to boost::string_view.
+ *
+ * This allows using String as the value for HTTP headers in boost::beast::http::basic_fields::set.
+ *
+ * @return A boost::string_view representing this string.
+ */
+String::operator boost::string_view() const
+{
+	return boost::string_view(m_Data);
+}
+
 const char *String::CStr() const
 {
 	return m_Data.c_str();
diff --git a/lib/base/string.hpp b/lib/base/string.hpp
index e9799e7eb..b9290eeee 100644
--- a/lib/base/string.hpp
+++ b/lib/base/string.hpp
@@ -6,6 +6,7 @@
 #include "base/i2-base.hpp"
 #include "base/object.hpp"
 #include <boost/range/iterator.hpp>
+#include <boost/utility/string_view.hpp>
 #include <string>
 #include <iosfwd>
 
@@ -71,6 +72,7 @@ public:
 	bool operator<(const String& rhs) const;
 
 	operator const std::string&() const;
+	operator boost::string_view() const;
 
 	const char *CStr() const;
 
diff --git a/lib/base/utility.cpp b/lib/base/utility.cpp
index 1add7616c..d8e6f20b0 100644
--- a/lib/base/utility.cpp
+++ b/lib/base/utility.cpp
@@ -725,7 +725,11 @@ void Utility::CopyFile(const String& source, const String& target)
 {
 	namespace fs = boost::filesystem;
 
+#if BOOST_VERSION >= 107400
+	fs::copy_file(fs::path(source.Begin(), source.End()), fs::path(target.Begin(), target.End()), fs::copy_options::overwrite_existing);
+#else /* BOOST_VERSION */
 	fs::copy_file(fs::path(source.Begin(), source.End()), fs::path(target.Begin(), target.End()), fs::copy_option::overwrite_if_exists);
+#endif /* BOOST_VERSION */
 }
 
 /*
diff --git a/lib/perfdata/elasticsearchwriter.cpp b/lib/perfdata/elasticsearchwriter.cpp
index 7798ad8dc..1cda8afce 100644
--- a/lib/perfdata/elasticsearchwriter.cpp
+++ b/lib/perfdata/elasticsearchwriter.cpp
@@ -494,7 +494,7 @@ void ElasticsearchWriter::SendRequest(const String& body)
 		request.set(http::field::authorization, "Basic " + Base64::Encode(username + ":" + password));
 
 	request.body() = body;
-	request.set(http::field::content_length, request.body().size());
+	request.content_length(request.body().size());
 
 	/* Don't log the request body to debug log, this is already done above. */
 	Log(LogDebug, "ElasticsearchWriter")
diff --git a/lib/perfdata/influxdbwriter.cpp b/lib/perfdata/influxdbwriter.cpp
index 1e02e5213..8e64c4c6a 100644
--- a/lib/perfdata/influxdbwriter.cpp
+++ b/lib/perfdata/influxdbwriter.cpp
@@ -504,7 +504,7 @@ void InfluxdbWriter::Flush()
 	request.set(http::field::host, url->GetHost() + ":" + url->GetPort());
 
 	request.body() = body;
-	request.set(http::field::content_length, request.body().size());
+	request.content_length(request.body().size());
 
 	try {
 		if (stream.first) {
diff --git a/lib/remote/configfileshandler.cpp b/lib/remote/configfileshandler.cpp
index d714f4d86..6013d9722 100644
--- a/lib/remote/configfileshandler.cpp
+++ b/lib/remote/configfileshandler.cpp
@@ -84,7 +84,7 @@ bool ConfigFilesHandler::HandleRequest(
 		response.result(http::status::ok);
 		response.set(http::field::content_type, "application/octet-stream");
 		response.body() = content;
-		response.set(http::field::content_length, response.body().size());
+		response.content_length(response.body().size());
 	} catch (const std::exception& ex) {
 		HttpUtility::SendJsonError(response, params, 500, "Could not read file.",
 			DiagnosticInformation(ex));
diff --git a/lib/remote/httpserverconnection.cpp b/lib/remote/httpserverconnection.cpp
index 3e0a4f27f..e32e6dc90 100644
--- a/lib/remote/httpserverconnection.cpp
+++ b/lib/remote/httpserverconnection.cpp
@@ -186,7 +186,7 @@ bool EnsureValidHeaders(
 		} else {
 			response.set(http::field::content_type, "text/html");
 			response.body() = String("<h1>Bad Request</h1><p><pre>") + errorMsg + "</pre></p>";
-			response.set(http::field::content_length, response.body().size());
+			response.content_length(response.body().size());
 		}
 
 		response.set(http::field::connection, "close");
@@ -259,7 +259,7 @@ bool HandleAccessControl(
 					response.set(http::field::access_control_allow_methods, "GET, POST, PUT, DELETE");
 					response.set(http::field::access_control_allow_headers, "Authorization, X-HTTP-Method-Override");
 					response.body() = "Preflight OK";
-					response.set(http::field::content_length, response.body().size());
+					response.content_length(response.body().size());
 					response.set(http::field::connection, "close");
 
 					boost::system::error_code ec;
@@ -290,7 +290,7 @@ bool EnsureAcceptHeader(
 		response.result(http::status::bad_request);
 		response.set(http::field::content_type, "text/html");
 		response.body() = "<h1>Accept header is missing or not set to 'application/json'.</h1>";
-		response.set(http::field::content_length, response.body().size());
+		response.content_length(response.body().size());
 		response.set(http::field::connection, "close");
 
 		boost::system::error_code ec;
@@ -331,7 +331,7 @@ bool EnsureAuthenticatedUser(
 		} else {
 			response.set(http::field::content_type, "text/html");
 			response.body() = "<h1>Unauthorized. Please check your user credentials.</h1>";
-			response.set(http::field::content_length, response.body().size());
+			response.content_length(response.body().size());
 		}
 
 		boost::system::error_code ec;
@@ -423,7 +423,7 @@ bool EnsureValidBody(
 		} else {
 			response.set(http::field::content_type, "text/html");
 			response.body() = String("<h1>Bad Request</h1><p><pre>") + ec.message() + "</pre></p>";
-			response.set(http::field::content_length, response.body().size());
+			response.content_length(response.body().size());
 		}
 
 		response.set(http::field::connection, "close");
diff --git a/lib/remote/httputility.cpp b/lib/remote/httputility.cpp
index 91902ba50..a2142e5d8 100644
--- a/lib/remote/httputility.cpp
+++ b/lib/remote/httputility.cpp
@@ -58,7 +58,7 @@ void HttpUtility::SendJsonBody(boost::beast::http::response<boost::beast::http::
 
 	response.set(http::field::content_type, "application/json");
 	response.body() = JsonEncode(val, params && GetLastParameter(params, "pretty"));
-	response.set(http::field::content_length, response.body().size());
+	response.content_length(response.body().size());
 }
 
 void HttpUtility::SendJsonError(boost::beast::http::response<boost::beast::http::string_body>& response,
diff --git a/lib/remote/infohandler.cpp b/lib/remote/infohandler.cpp
index 18c18c0e0..80ebba77b 100644
--- a/lib/remote/infohandler.cpp
+++ b/lib/remote/infohandler.cpp
@@ -92,7 +92,7 @@ bool InfoHandler::HandleRequest(
 
 		body += R"(<p>More information about API requests is available in the <a href="https://icinga.com/docs/icinga2/latest/" target="_blank">documentation</a>.</p></html>)";
 		response.body() = body;
-		response.set(http::field::content_length, response.body().size());
+		response.content_length(response.body().size());
 	}
 
 	return true;