diff --git a/pisi-index.xml b/pisi-index.xml
index 9e38197d2e..4f8964bda6 100644
--- a/pisi-index.xml
+++ b/pisi-index.xml
@@ -270988,7 +270988,7 @@ Bu Skype SILK codec ve Xiph.Org 's Celt codec teknolojisi dahil RFC 6716 ol
             <Update release="1">
                 <Date>2023-06-25</Date>
                 <Version>4.0.3</Version>
-                <Comment>First release</Comment>
+                <Comment>First release.</Comment>
                 <Name>Kamil Atlı</Name>
                 <Email>suvari@pisilinux.org</Email>
             </Update>
@@ -359974,6 +359974,47 @@ provide integrated access to the cloud providers services.</Description>
             </Update>
         </History>
     </SpecFile>
+    <SpecFile>
+        <Source>
+            <Name>nlohmann-json</Name>
+            <Homepage>https://json.nlohmann.me</Homepage>
+            <Packager>
+                <Name>Kamil Atlı</Name>
+                <Email>suvari@pisilinux.org</Email>
+            </Packager>
+            <License>MIT</License>
+            <PartOf>programming.library</PartOf>
+            <Summary xml:lang="en">JSON for Modern C++</Summary>
+            <Summary xml:lang="tr">Modern C++ için JSON</Summary>
+            <Description xml:lang="en">JSON for Modern C++</Description>
+            <Description xml:lang="tr">CModern C++ için JSON</Description>
+            <Icon>nlohmann-json</Icon>
+            <Archive type="targz" sha1sum="a6090d28a631b72f416b83166425a2f09c6c91d8" name="v3.11.2.tar.gz">https://github.com/nlohmann/json/archive/5d2754306d67d1e654a1a34e1d2e74439a9d53b3/v3.11.2.tar.gz</Archive>
+            <Archive type="binary" sha1sum="139e4f927cc7b1998c025d60a9a63a3a6f1929f6" target="json-5d2754306d67d1e654a1a34e1d2e74439a9d53b3" name="v3.1.0.tar.gz">https://github.com/nlohmann/json_test_data/archive/refs/tags/v3.1.0.tar.gz</Archive>
+            <BuildDependencies>
+                <Dependency>git</Dependency>
+                <Dependency>cmake</Dependency>
+            </BuildDependencies>
+            <SourceURI>programming/library/nlohmann-json/pspec.xml</SourceURI>
+        </Source>
+        <Package>
+            <Name>nlohmann-json</Name>
+            <Files>
+                <Path fileType="header">/usr/include</Path>
+                <Path fileType="library">/usr/lib/pkgconfig</Path>
+                <Path fileType="data">/usr/share/cmake</Path>
+            </Files>
+        </Package>
+        <History>
+            <Update release="1">
+                <Date>2023-06-21</Date>
+                <Version>3.11.2</Version>
+                <Comment>First release</Comment>
+                <Name>Kamil Atlı</Name>
+                <Email>suvari@pisilinux.org</Email>
+            </Update>
+        </History>
+    </SpecFile>
     <SpecFile>
         <Source>
             <Name>p8-platform</Name>
diff --git a/pisi-index.xml.sha1sum b/pisi-index.xml.sha1sum
index f61e9d33cb..222704d8bf 100644
--- a/pisi-index.xml.sha1sum
+++ b/pisi-index.xml.sha1sum
@@ -1 +1 @@
-73b12da3dcff19e8d3dfde3e165aeb7d31f5ef20
\ No newline at end of file
+b98f9a799b99fb261a5465bc7cd03dae7c781310
\ No newline at end of file
diff --git a/pisi-index.xml.xz b/pisi-index.xml.xz
index 1bcf41d16f..259bbdefda 100644
Binary files a/pisi-index.xml.xz and b/pisi-index.xml.xz differ
diff --git a/pisi-index.xml.xz.sha1sum b/pisi-index.xml.xz.sha1sum
index 7ddde1d2f1..df897c4f3d 100644
--- a/pisi-index.xml.xz.sha1sum
+++ b/pisi-index.xml.xz.sha1sum
@@ -1 +1 @@
-ceb5366283eed11ae34f1336d20d54d028285007
\ No newline at end of file
+7b302ad5f198840ae8505b73cf7cadb9a3684abd
\ No newline at end of file
diff --git a/programming/library/nlohmann-json/actions.py b/programming/library/nlohmann-json/actions.py
new file mode 100644
index 0000000000..95e855280c
--- /dev/null
+++ b/programming/library/nlohmann-json/actions.py
@@ -0,0 +1,37 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#
+# Licensed under the GNU General Public License, version 3.
+# See the file http://www.gnu.org/licenses/gpl.txt
+
+from pisi.actionsapi import shelltools
+from pisi.actionsapi import cmaketools
+from pisi.actionsapi import pisitools
+from pisi.actionsapi import get
+
+def setup():
+    shelltools.makedirs("build")
+    shelltools.cd("build")
+
+    cmaketools.configure("-DCMAKE_BUILD_TYPE='None' \
+        -DCMAKE_INSTALL_PREFIX='/usr' \
+        -DCMAKE_INSTALL_LIBDIR='/usr/lib' \
+        -DBUILD_SHARED_LIBS=ON \
+        -DBUILD_STATIC_LIBS=OFF \
+        -DBUILD_TESTING=ON \
+        -DJSON_BuildTests=ON \
+        -DJSON_MultipleHeaders=ON \
+        -Wno-dev", sourceDir="..")
+
+def build():
+    cmaketools.make("-B build")
+
+
+def install():
+    shelltools.cd("build")
+    cmaketools.rawInstall("DESTDIR=%s" % get.installDIR())
+
+    pisitools.domove("/usr/share/pkgconfig", "/usr/lib")
+
+    # pisitools.dodoc("./LICENSES")
+
diff --git a/programming/library/nlohmann-json/pspec.xml b/programming/library/nlohmann-json/pspec.xml
new file mode 100644
index 0000000000..e02afc7dad
--- /dev/null
+++ b/programming/library/nlohmann-json/pspec.xml
@@ -0,0 +1,46 @@
+<?xml version="1.0" ?>
+<!DOCTYPE PISI SYSTEM "https://pisilinux.org/projeler/pisi/pisi-spec.dtd">
+<PISI>
+    <Source>
+        <Name>nlohmann-json</Name>
+        <Homepage>https://json.nlohmann.me</Homepage>
+        <Packager>
+            <Name>Kamil Atlı</Name>
+            <Email>suvari@pisilinux.org</Email>
+        </Packager>
+        <License>MIT</License>
+        <Icon>nlohmann-json</Icon>
+        <Summary>JSON for Modern C++</Summary>
+        <Description>JSON for Modern C++</Description>
+        <Archive sha1sum="a6090d28a631b72f416b83166425a2f09c6c91d8" type="targz">https://github.com/nlohmann/json/archive/5d2754306d67d1e654a1a34e1d2e74439a9d53b3/v3.11.2.tar.gz</Archive>
+        <Archive sha1sum="139e4f927cc7b1998c025d60a9a63a3a6f1929f6" type="binary" target="json-5d2754306d67d1e654a1a34e1d2e74439a9d53b3">https://github.com/nlohmann/json_test_data/archive/refs/tags/v3.1.0.tar.gz</Archive>
+         <BuildDependencies>
+            <Dependency>git</Dependency>
+            <Dependency>cmake</Dependency>
+        </BuildDependencies>
+        <Patches>
+<!--             <Patch></Patch> -->
+        </Patches>
+    </Source>
+
+    <Package>
+        <Name>nlohmann-json</Name>
+        <RuntimeDependencies>
+        </RuntimeDependencies>
+        <Files>
+            <Path fileType="header">/usr/include</Path>
+            <Path fileType="library">/usr/lib/pkgconfig</Path>
+            <Path fileType="data">/usr/share/cmake</Path>
+        </Files>
+    </Package>
+
+    <History>
+        <Update release="1">
+            <Date>2023-06-21</Date>
+            <Version>3.11.2</Version>
+            <Comment>First release</Comment>
+            <Name>Kamil Atlı</Name>
+            <Email>suvari@pisilinux.org</Email>
+        </Update>
+    </History>
+</PISI>
diff --git a/programming/library/nlohmann-json/translations.xml b/programming/library/nlohmann-json/translations.xml
new file mode 100644
index 0000000000..7849856bdf
--- /dev/null
+++ b/programming/library/nlohmann-json/translations.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" ?>
+<PISI>
+    <Source>
+        <Name>nlohmann-json</Name>
+        <Summary xml:lang="tr">Modern C++ için JSON</Summary>
+        <Description xml:lang="tr">CModern C++ için JSON</Description>
+    </Source>
+</PISI>