diff --git a/internal/core/src/index/thirdparty/versions.txt b/internal/core/src/index/thirdparty/versions.txt
index c5cea80234..26aee14c67 100644
--- a/internal/core/src/index/thirdparty/versions.txt
+++ b/internal/core/src/index/thirdparty/versions.txt
@@ -1,6 +1,4 @@
-ARROW_VERSION=apache-arrow-0.15.1
 BOOST_VERSION=1.70.0
-GTEST_VERSION=1.8.1
 LAPACK_VERSION=v3.8.0
 OPENBLAS_VERSION=0.3.9
 MKL_VERSION=2019.5.281
diff --git a/internal/core/thirdparty/versions.txt b/internal/core/thirdparty/versions.txt
index f4862e989e..c2c1a873ed 100644
--- a/internal/core/thirdparty/versions.txt
+++ b/internal/core/thirdparty/versions.txt
@@ -1,7 +1,4 @@
-EASYLOGGINGPP_VERSION=v9.96.7
 GTEST_VERSION=1.8.1
 YAMLCPP_VERSION=0.6.3
-ZLIB_VERSION=v1.2.11
 OPENTRACING_VERSION=v1.5.1
 PROTOBUF_VERSION=3.9.0
-# vim: set filetype=sh: