diff --git a/.gitignore b/.gitignore
index d5e99f6..89a0055 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 /scientific-0.3.3.8.tar.gz
 /scientific-0.3.4.7.tar.gz
 /scientific-0.3.4.10.tar.gz
+/integer-logarithms-1.0.1.tar.gz
diff --git a/sources b/sources
index ba02cd5..269a27b 100644
--- a/sources
+++ b/sources
@@ -1 +1,2 @@
+SHA512 (integer-logarithms-1.0.1.tar.gz) = 14c84774eb94b6eb5ed172254106a5c53276ed3f24672d18b955d9d413a6012db7c70cd5444cbc630a849a8b57292d4c6ab826f0266798ab174d4050fe45bcd5
 SHA512 (scientific-0.3.4.10.tar.gz) = 6d91f27e5cbf4e5e1dfd13e509b9b98ff205aa15cbe1cf28a147436e4b27d1bcecf5c174433a02b2e9f5824ed8d711a1faf39f6ed99c9c361fff590abd822338