diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ed1ab356..7062ae78 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -16,7 +16,7 @@
 # along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
 
 ---
-image: harbor.protontech.ch/docker.io/library/golang:1.18
+image: gitlab.protontech.ch:4567/go/bridge-internal:test-go1.20
 
 variables:
   GOPRIVATE: gitlab.protontech.ch
@@ -126,10 +126,10 @@ test-integration-race:
 
 .windows-base:
   before_script:
-    - export GOROOT=/c/Go1.18
+    - export GOROOT=/c/Go1.20
     - export PATH=$GOROOT/bin:$PATH
     - export GOARCH=amd64
-    - export GOPATH=~/go18
+    - export GOPATH=~/go1.20
     - export GO111MODULE=on
     - export PATH=$GOPATH/bin:$PATH
     - export MSYSTEM=
@@ -172,7 +172,7 @@ test-windows:
 
 
 .linux-build-setup:
-  image: gitlab.protontech.ch:4567/go/bridge-internal:qt6
+  image: gitlab.protontech.ch:4567/go/bridge-internal:build-go1.20-qt6.3.2
   variables:
     VCPKG_DEFAULT_BINARY_CACHE: ${CI_PROJECT_DIR}/.cache
   cache:
@@ -209,7 +209,7 @@ build-linux-qa:
     - export PATH=/usr/local/opt/make/libexec/gnubin:$PATH
     - export PATH=/usr/local/opt/go@1.13/bin:$PATH
     - export PATH=/usr/local/opt/gnu-sed/libexec/gnubin:$PATH
-    - export GOPATH=~/go
+    - export GOPATH=~/go1.20
     - export PATH=$GOPATH/bin:$PATH
     - export CGO_CPPFLAGS='-Wno-error -Wno-nullability-completeness -Wno-expansion-to-defined -Wno-builtin-requires-header'
     - $(git config --global -l | grep -o 'url.*gitlab.protontech.ch.*insteadof' | xargs -L 1 git config --global --unset &> /dev/null) || echo "nothing to remove"
@@ -231,10 +231,10 @@ build-darwin-qa:
 
 .windows-build-setup:
   before_script:
-    - export GOROOT=/c/Go1.18/
+    - export GOROOT=/c/Go1.20/
     - export PATH=$GOROOT/bin:$PATH
     - export GOARCH=amd64
-    - export GOPATH=~/go18
+    - export GOPATH=~/go1.20
     - export GO111MODULE=on
     - export PATH="${GOPATH}/bin:${PATH}"
     - export MSYSTEM=
diff --git a/BUILDS.md b/BUILDS.md
index eb4abc7a..237694bd 100644
--- a/BUILDS.md
+++ b/BUILDS.md
@@ -3,7 +3,7 @@
 ## Prerequisites
 * 64-bit OS:
     - the go-rfc5322 module cannot currently be compiled for 32-bit OSes
-* Go 1.18
+* Go 1.20
 * Bash with basic build utils: make, gcc, sed, find, grep, ...
   - For Windows, it is recommended to use MinGW 64bit shell from [MSYS2](https://www.msys2.org/)
 * GCC (Linux), msvc (Windows) or Xcode (macOS)
diff --git a/go.mod b/go.mod
index 87cb8bc8..d109e84c 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/ProtonMail/proton-bridge/v3
 
-go 1.18
+go 1.20
 
 require (
 	github.com/0xAX/notificator v0.0.0-20220220101646-ee9b8921e557
diff --git a/internal/app/app.go b/internal/app/app.go
index 16487e51..f2c15178 100644
--- a/internal/app/app.go
+++ b/internal/app/app.go
@@ -19,14 +19,12 @@ package app
 
 import (
 	"fmt"
-	"math/rand"
 	"net/http"
 	"net/http/cookiejar"
 	"net/url"
 	"os"
 	"path/filepath"
 	"runtime"
-	"time"
 
 	"github.com/Masterminds/semver/v3"
 	"github.com/ProtonMail/gluon/async"
@@ -160,9 +158,6 @@ func New() *cli.App {
 }
 
 func run(c *cli.Context) error {
-	// Seed the default RNG from the math/rand package.
-	rand.Seed(time.Now().UnixNano())
-
 	// Get the current bridge version.
 	version, err := semver.NewVersion(constants.Version)
 	if err != nil {