diff --git a/.gitignore b/.gitignore
index 5c9d8e5..b98cf8e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,7 @@ SOURCES/postgresql-13.7.tar.bz2
 SOURCES/postgresql-15.2-US.pdf
 SOURCES/postgresql-15.2.tar.bz2
 SOURCES/postgresql-setup-8.8.tar.gz
+/postgresql-13.7.tar.bz2
+/postgresql-15.2-US.pdf
+/postgresql-15.2.tar.bz2
+/postgresql-setup-8.8.tar.gz
diff --git a/.postgresql.metadata b/.postgresql.metadata
new file mode 100644
index 0000000..c3cb527
--- /dev/null
+++ b/.postgresql.metadata
@@ -0,0 +1 @@
+cb4c0aed7cee21f3a1f4756fc61054d8ba756e2b postgresql-13.7.tar.bz2
diff --git a/sources b/sources
old mode 100755
new mode 100644
index e5e15ca..e4e40ed
--- a/sources
+++ b/sources
@@ -1,4 +1,4 @@
-SHA1 (postgresql-13.7.tar.bz2) = cb4c0aed7cee21f3a1f4756fc61054d8ba756e2b
-SHA1 (postgresql-15.2-US.pdf) = 782baa9b34c7fc8cd487ef426fc4321c3f9e34a9
-SHA1 (postgresql-15.2.tar.bz2) = 8c7706a7ef267e49026434378836b76e4d4ad532
-SHA1 (postgresql-setup-8.8.tar.gz) = c5aa3e8b728c67b294815931c91c86aa61932bb5
+SHA512 (postgresql-13.7.tar.bz2) = 9254f21519c8d4e926f70082503bb5593c91064a3d2a4ea18ac503dfd9aa94751d6f01ce00fca9fec9b2b7af40caf8d0951b661dd8be4d6aa87c1e35b6fa7a41
+SHA512 (postgresql-15.2-US.pdf) = 9badd72b196a85e4ac8264c8f06ff3816716bedd7f235f1069b6a4651ca665737b68b571f0abda015aee6a06e6dc060c965a6db6c7a2fc3fc55d33b5fdd6587b
+SHA512 (postgresql-15.2.tar.bz2) = 115a8a4234791bba4e6dcc4617e9dd77abedcf767894ce9472c59cce9d5d4ef2d4e1746f3a0c7a99de4fc4385fb716652b70dce9f48be45a9db5a682517db7e8
+SHA512 (postgresql-setup-8.8.tar.gz) = 4569e5ba83b16556312b89cd6762eb55902eb9265ce9ceb0e0fe18755e1ab7217ea748df465c4402e24d19b55b25702deab92030510dc722db8fcbc0cb639053