diff --git a/src/App.cpp b/src/App.cpp
deleted file mode 100644
index a6b30a74..00000000
--- a/src/App.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright (c) 2017-2022, University of Cincinnati, developed by Henry Schreiner
-// under NSF AWARD 1414736 and by the respective contributors.
-// All rights reserved.
-//
-// SPDX-License-Identifier: BSD-3-Clause
-
-#include <CLI/impl/App_inl.hpp>
-
-#include <CLI/Config.hpp>
-#include <CLI/Formatter.hpp>
diff --git a/src/Config.cpp b/src/Config.cpp
deleted file mode 100644
index bd5eda28..00000000
--- a/src/Config.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright (c) 2017-2022, University of Cincinnati, developed by Henry Schreiner
-// under NSF AWARD 1414736 and by the respective contributors.
-// All rights reserved.
-//
-// SPDX-License-Identifier: BSD-3-Clause
-
-#include <CLI/impl/Config_inl.hpp>
diff --git a/src/Formatter.cpp b/src/Formatter.cpp
deleted file mode 100644
index f0ce80e6..00000000
--- a/src/Formatter.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright (c) 2017-2022, University of Cincinnati, developed by Henry Schreiner
-// under NSF AWARD 1414736 and by the respective contributors.
-// All rights reserved.
-//
-// SPDX-License-Identifier: BSD-3-Clause
-
-#include <CLI/impl/Formatter_inl.hpp>
diff --git a/src/Option.cpp b/src/Option.cpp
deleted file mode 100644
index 32118fc7..00000000
--- a/src/Option.cpp
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright (c) 2017-2022, University of Cincinnati, developed by Henry Schreiner
-// under NSF AWARD 1414736 and by the respective contributors.
-// All rights reserved.
-//
-// SPDX-License-Identifier: BSD-3-Clause
-
-#include <CLI/impl/Option_inl.hpp>
-#include <CLI/App.hpp>
-
-template class CLI::OptionBase<CLI::OptionDefaults>;
-template class CLI::OptionBase<CLI::Option>;
-
-template void CLI::OptionBase<CLI::OptionDefaults>::copy_to(CLI::Option *) const;
diff --git a/src/StringTools.cpp b/src/Precompile.cpp
similarity index 54%
rename from src/StringTools.cpp
rename to src/Precompile.cpp
index 7df3c019..81900ced 100644
--- a/src/StringTools.cpp
+++ b/src/Precompile.cpp
@@ -4,4 +4,10 @@
 //
 // SPDX-License-Identifier: BSD-3-Clause
 
+#include <CLI/impl/App_inl.hpp>
+#include <CLI/impl/Config_inl.hpp>
+#include <CLI/impl/Formatter_inl.hpp>
+#include <CLI/impl/Option_inl.hpp>
+#include <CLI/impl/Split_inl.hpp>
 #include <CLI/impl/StringTools_inl.hpp>
+#include <CLI/impl/Validators_inl.hpp>
diff --git a/src/Split.cpp b/src/Split.cpp
deleted file mode 100644
index 6b47783f..00000000
--- a/src/Split.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright (c) 2017-2022, University of Cincinnati, developed by Henry Schreiner
-// under NSF AWARD 1414736 and by the respective contributors.
-// All rights reserved.
-//
-// SPDX-License-Identifier: BSD-3-Clause
-
-#include <CLI/impl/Split_inl.hpp>
diff --git a/src/Validators.cpp b/src/Validators.cpp
deleted file mode 100644
index da683b98..00000000
--- a/src/Validators.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright (c) 2017-2022, University of Cincinnati, developed by Henry Schreiner
-// under NSF AWARD 1414736 and by the respective contributors.
-// All rights reserved.
-//
-// SPDX-License-Identifier: BSD-3-Clause
-
-#include <CLI/impl/Validators_inl.hpp>