diff --git a/cli/cmdlineparser.h b/cli/cmdlineparser.h
index ef36c44476a..b5c8c89f37c 100644
--- a/cli/cmdlineparser.h
+++ b/cli/cmdlineparser.h
@@ -1,6 +1,6 @@
 /*
  * Cppcheck - A tool for static C/C++ code analysis
- * Copyright (C) 2007-2020 Cppcheck team.
+ * Copyright (C) 2007-2021 Cppcheck team.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/gui/precompiled_qmake.h b/gui/precompiled_qmake.h
index 1042ca82dd1..09c404a9810 100644
--- a/gui/precompiled_qmake.h
+++ b/gui/precompiled_qmake.h
@@ -1,6 +1,6 @@
 /*
  * Cppcheck - A tool for static C/C++ code analysis
- * Copyright (C) 2007-2020 Cppcheck team.
+ * Copyright (C) 2007-2021 Cppcheck team.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/lib/bughuntingchecks.h b/lib/bughuntingchecks.h
index dcd7c09025d..62d653f0df8 100644
--- a/lib/bughuntingchecks.h
+++ b/lib/bughuntingchecks.h
@@ -1,6 +1,6 @@
 /*
  * Cppcheck - A tool for static C/C++ code analysis
- * Copyright (C) 2007-2020 Cppcheck team.
+ * Copyright (C) 2007-2021 Cppcheck team.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/lib/clangimport.h b/lib/clangimport.h
index b6e0e3cb0d4..278069dec76 100644
--- a/lib/clangimport.h
+++ b/lib/clangimport.h
@@ -1,6 +1,6 @@
 /*
  * Cppcheck - A tool for static C/C++ code analysis
- * Copyright (C) 2007-2020 Cppcheck team.
+ * Copyright (C) 2007-2021 Cppcheck team.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/lib/color.cpp b/lib/color.cpp
index c74127d5d3e..d068ebefa6b 100644
--- a/lib/color.cpp
+++ b/lib/color.cpp
@@ -1,3 +1,21 @@
+/*
+ * Cppcheck - A tool for static C/C++ code analysis
+ * Copyright (C) 2007-2021 Cppcheck team.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include "color.h"
 #ifndef _WIN32
 #include <unistd.h>
diff --git a/lib/errortypes.cpp b/lib/errortypes.cpp
index 237ebbfacca..094a286e533 100644
--- a/lib/errortypes.cpp
+++ b/lib/errortypes.cpp
@@ -1,6 +1,6 @@
 /*
  * Cppcheck - A tool for static C/C++ code analysis
- * Copyright (C) 2007-2020 Cppcheck team.
+ * Copyright (C) 2007-2021 Cppcheck team.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/lib/forwardanalyzer.cpp b/lib/forwardanalyzer.cpp
index bf94b39fd25..92d3b19fe86 100644
--- a/lib/forwardanalyzer.cpp
+++ b/lib/forwardanalyzer.cpp
@@ -1,3 +1,21 @@
+/*
+ * Cppcheck - A tool for static C/C++ code analysis
+ * Copyright (C) 2007-2021 Cppcheck team.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include "forwardanalyzer.h"
 #include "analyzer.h"
 #include "astutils.h"
diff --git a/lib/infer.cpp b/lib/infer.cpp
index cc044774179..d1f795287fd 100644
--- a/lib/infer.cpp
+++ b/lib/infer.cpp
@@ -1,3 +1,21 @@
+/*
+ * Cppcheck - A tool for static C/C++ code analysis
+ * Copyright (C) 2007-2021 Cppcheck team.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include "infer.h"
 #include "calculate.h"
 #include "valueptr.h"
diff --git a/lib/pathanalysis.cpp b/lib/pathanalysis.cpp
index 04b8bfaceee..4381e8e7888 100644
--- a/lib/pathanalysis.cpp
+++ b/lib/pathanalysis.cpp
@@ -1,3 +1,21 @@
+/*
+ * Cppcheck - A tool for static C/C++ code analysis
+ * Copyright (C) 2007-2021 Cppcheck team.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include "pathanalysis.h"
 #include "astutils.h"
 #include "symboldatabase.h"
diff --git a/lib/pathanalysis.h b/lib/pathanalysis.h
index af7b8834c0b..b8b01801a1f 100644
--- a/lib/pathanalysis.h
+++ b/lib/pathanalysis.h
@@ -1,3 +1,21 @@
+/*
+ * Cppcheck - A tool for static C/C++ code analysis
+ * Copyright (C) 2007-2021 Cppcheck team.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #ifndef GUARD_PATHANALYSIS_H
 #define GUARD_PATHANALYSIS_H
 
diff --git a/lib/pathmatch.cpp b/lib/pathmatch.cpp
index 583ba4178f9..04286274807 100644
--- a/lib/pathmatch.cpp
+++ b/lib/pathmatch.cpp
@@ -1,6 +1,6 @@
 /*
  * Cppcheck - A tool for static C/C++ code analysis
- * Copyright (C) 2007-2020 Cppcheck team.
+ * Copyright (C) 2007-2021 Cppcheck team.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/lib/precompiled.h b/lib/precompiled.h
index 4340c4d4943..f4cceae3112 100644
--- a/lib/precompiled.h
+++ b/lib/precompiled.h
@@ -1,6 +1,6 @@
 /*
  * Cppcheck - A tool for static C/C++ code analysis
- * Copyright (C) 2007-2020 Cppcheck team.
+ * Copyright (C) 2007-2021 Cppcheck team.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/lib/programmemory.cpp b/lib/programmemory.cpp
index cee110dc5f4..8821fbc8e7c 100644
--- a/lib/programmemory.cpp
+++ b/lib/programmemory.cpp
@@ -1,3 +1,20 @@
+/*
+ * Cppcheck - A tool for static C/C++ code analysis
+ * Copyright (C) 2007-2021 Cppcheck team.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #include "programmemory.h"
 #include "astutils.h"
diff --git a/lib/programmemory.h b/lib/programmemory.h
index 5dfe5b15647..74d598285d0 100644
--- a/lib/programmemory.h
+++ b/lib/programmemory.h
@@ -1,3 +1,21 @@
+/*
+ * Cppcheck - A tool for static C/C++ code analysis
+ * Copyright (C) 2007-2021 Cppcheck team.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #ifndef GUARD_PROGRAMMEMORY_H
 #define GUARD_PROGRAMMEMORY_H
 
diff --git a/lib/reverseanalyzer.cpp b/lib/reverseanalyzer.cpp
index 7adfc77123b..90db4e69dfb 100644
--- a/lib/reverseanalyzer.cpp
+++ b/lib/reverseanalyzer.cpp
@@ -1,3 +1,21 @@
+/*
+ * Cppcheck - A tool for static C/C++ code analysis
+ * Copyright (C) 2007-2021 Cppcheck team.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include "reverseanalyzer.h"
 #include "analyzer.h"
 #include "astutils.h"
diff --git a/lib/standards.h b/lib/standards.h
index 8dd28847c49..b7873d7c18b 100644
--- a/lib/standards.h
+++ b/lib/standards.h
@@ -1,6 +1,6 @@
 /*
  * Cppcheck - A tool for static C/C++ code analysis
- * Copyright (C) 2007-2020 Cppcheck team.
+ * Copyright (C) 2007-2021 Cppcheck team.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/lib/summaries.cpp b/lib/summaries.cpp
index 39497ed15ce..98e5de43cbe 100644
--- a/lib/summaries.cpp
+++ b/lib/summaries.cpp
@@ -1,3 +1,20 @@
+/*
+ * Cppcheck - A tool for static C/C++ code analysis
+ * Copyright (C) 2007-2021 Cppcheck team.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #include "summaries.h"