diff --git a/cli/modules/Dump.cpp b/cli/modules/Dump.cpp
index c49e8a101..e0b17ab92 100644
--- a/cli/modules/Dump.cpp
+++ b/cli/modules/Dump.cpp
@@ -541,7 +541,7 @@ std::string Dump::call(const po::variables_map &vm, const po::options_descriptio
                 throw FileNotFound(file_path);
             }
             // try to open!
-            tmp_file = nix::File::open(file_path, nix::FileMode::ReadWrite);
+            tmp_file = nix::File::open(file_path, nix::FileMode::ReadOnly);
             // file opened?
             if (!tmp_file.isOpen()) {
                 throw FileNotOpen(file_path);
diff --git a/cli/modules/Validate.cpp b/cli/modules/Validate.cpp
index 402680d1b..2de831e6f 100644
--- a/cli/modules/Validate.cpp
+++ b/cli/modules/Validate.cpp
@@ -49,7 +49,7 @@ std::string Validate::call(const po::variables_map &vm, const po::options_descri
                 throw FileNotFound(file_path);
             }
             // try to open!
-            tmp_file = nix::File::open(file_path, nix::FileMode::ReadWrite);
+            tmp_file = nix::File::open(file_path, nix::FileMode::ReadOnly);
             // file opened?
             if (!tmp_file.isOpen()) {
                 throw FileNotOpen(file_path);