diff --git a/.circleci/config.yml b/.circleci/config.yml
index 56aca3cbcd..acf892b527 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -31,7 +31,7 @@ orbs:
     executors:
       operator-build:
         docker:
-          - image: ghcr.io/konpyutaika/docker-images/nifikop-build:1.20
+          - image: ghcr.io/konpyutaika/docker-images/nifikop-build:1.20.5
     # Define jobs list
     jobs:
       # Build job, which build operator docker image (with operator-sdk build)
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 85d1a3fec4..6f5b07afdf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
 
 - [PR #257](https://github.com/konpyutaika/nifikop/pull/257) - **[Operator]** Updated the operator-sdk to 1.28.0.
 - [PR #263](https://github.com/konpyutaika/nifikop/pull/263) - **[NiGoApi]** Upgrade nigoapi to v0.0.8.
+- [PR #263](https://github.com/konpyutaika/nifikop/pull/268) - **[Operator]** Upgrade golang to 1.20.5.
 
 ### Fixed Bugs
 
diff --git a/Dockerfile b/Dockerfile
index 0cebd52010..487d0ed2be 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.20 as builder
+FROM golang:1.20.5 as builder
 
 WORKDIR /workspace
 
diff --git a/Makefile b/Makefile
index 286501c227..3bc14cf115 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ DOCKER_REGISTRY_BASE 	?= ghcr.io/konpyutaika/docker-images
 IMAGE_TAG				?= $(shell git describe --tags --abbrev=0 --match '[0-9].*[0-9].*[0-9]' 2>/dev/null)
 IMAGE_NAME 				?= $(SERVICE_NAME)
 BUILD_IMAGE				?= ghcr.io/konpyutaika/docker-images/nifikop-build
-GOLANG_VERSION          ?= 1.20
+GOLANG_VERSION          ?= 1.20.5
 IMAGE_TAG_BASE ?= <registry>/<operator name>
 OS = $(shell go env GOOS)
 ARCH = $(shell go env GOARCH)
diff --git a/docker/build-image/Dockerfile b/docker/build-image/Dockerfile
index baae035f1f..dc7ced0b3f 100644
--- a/docker/build-image/Dockerfile
+++ b/docker/build-image/Dockerfile
@@ -32,7 +32,7 @@ RUN apt-get update \
   && apt-get install -y \
     git apt \
     locales sudo openssh-client ca-certificates tar gzip \
-    net-tools netcat unzip zip bzip2 gnupg curl wget
+    net-tools netcat-traditional unzip zip bzip2 gnupg curl wget
 
 # Set timezone to UTC by default
 RUN ln -sf /usr/share/zoneinfo/Etc/UTC /etc/localtime
diff --git a/go.sum b/go.sum
index 2318924014..26da9a91cb 100644
--- a/go.sum
+++ b/go.sum
@@ -140,8 +140,6 @@ github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHm
 github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQLJ+jE2L00=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
-github.com/konpyutaika/nigoapi v0.0.6 h1:tyzs05rJ1DVbwb3zhdtV/T4k8tfRkAPaydZOGfQFSL0=
-github.com/konpyutaika/nigoapi v0.0.6/go.mod h1:ylinFOIwDzQvM+BbiDFWmr6l2Lexs2pg/jb9znIVAv4=
 github.com/konpyutaika/nigoapi v0.0.8 h1:eOp5Bj7v3PStEqmQrqETncyi5ZRg9k0ooEIZAp71GbU=
 github.com/konpyutaika/nigoapi v0.0.8/go.mod h1:ylinFOIwDzQvM+BbiDFWmr6l2Lexs2pg/jb9znIVAv4=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=