diff --git a/build/pkgs/giac/checksums.ini b/build/pkgs/giac/checksums.ini
index 51f6ed07599..51273e250dd 100644
--- a/build/pkgs/giac/checksums.ini
+++ b/build/pkgs/giac/checksums.ini
@@ -1,4 +1,4 @@
-tarball=giac_VERSION.tar.gz
-sha1=18e4406503b4e79e079fdf4c4c92d0dbc9b5d98f
-md5=2cb31bc402db916e28b1831c65a6b488
-cksum=3848173593
+tarball=giac-VERSION.tar.bz2
+sha1=e5f21744b344a8112e1d179e154ecf1e9f1318ba
+md5=adc278420abf2573d7e2ac910e67a12c
+cksum=785223596
diff --git a/build/pkgs/giac/package-version.txt b/build/pkgs/giac/package-version.txt
index 36799f83836..0ef4b261722 100644
--- a/build/pkgs/giac/package-version.txt
+++ b/build/pkgs/giac/package-version.txt
@@ -1 +1 @@
-1.5.0-37
+1.5.0.37
diff --git a/build/pkgs/giac/spkg-src b/build/pkgs/giac/spkg-src
index e8baa2584f2..061ca795bf4 100755
--- a/build/pkgs/giac/spkg-src
+++ b/build/pkgs/giac/spkg-src
@@ -13,8 +13,8 @@ fi
 # Exit on failure
 set -e
 
-VERSION="1.4.9"
-VERSIONREV="45"
+VERSION="1.5.0"
+VERSIONREV="37"
 
 # The upstream tarball name is: giac"$SOURCEORIG".tar.gz
 SOURCEORIG=_"$VERSION"-"$VERSIONREV"