diff --git a/chapters/4.application-implementation/4.3.implementation-technology-stack.tex b/chapters/4.application-implementation/4.3.implementation-technology-stack.tex
index 7f25191..3fac4f1 100644
--- a/chapters/4.application-implementation/4.3.implementation-technology-stack.tex
+++ b/chapters/4.application-implementation/4.3.implementation-technology-stack.tex
@@ -2,7 +2,7 @@
 
 Η παρούσα ενότητα απαρτίζεται από υποενότητες, στις οποίες διατυπώνονται τις βασικές τεχνολογίες που χρησιμοποιήθηκαν για την υλοποίηση της εφαρμογής.
 
-\input{chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.1.ui-technologies.tex}
-\input{chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.2.ethereum-technologies.tex}
-\input{chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.3.ipfs-technologies.tex}
-\input{chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.4.development-technologies.tex}
\ No newline at end of file
+\input{chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.1.development-technologies.tex}
+\input{chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.2.ui-technologies.tex}
+\input{chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.3.ethereum-technologies.tex}
+\input{chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.4.ipfs-technologies.tex}
diff --git a/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.4.development-technologies.tex b/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.1.development-technologies.tex
similarity index 100%
rename from chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.4.development-technologies.tex
rename to chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.1.development-technologies.tex
diff --git a/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.1.ui-technologies.tex b/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.2.ui-technologies.tex
similarity index 100%
rename from chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.1.ui-technologies.tex
rename to chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.2.ui-technologies.tex
diff --git a/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.2.ethereum-technologies.tex b/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.3.ethereum-technologies.tex
similarity index 100%
rename from chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.2.ethereum-technologies.tex
rename to chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.3.ethereum-technologies.tex
diff --git a/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.3.ipfs-technologies.tex b/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.4.ipfs-technologies.tex
similarity index 83%
rename from chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.3.ipfs-technologies.tex
rename to chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.4.ipfs-technologies.tex
index 2b56186..67cdf63 100644
--- a/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.3.ipfs-technologies.tex
+++ b/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.4.ipfs-technologies.tex
@@ -2,4 +2,4 @@
 
 Στην παρούσα υποενότητα θα περιγραφούν όσες τεχνολογίες σχετίζονται με το IPFS, δηλαδή με το Data tier.
 
-\input{chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.3.ipfs-technologies/4.3.3.1.orbit-db.tex}
+\input{chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.4.ipfs-technologies/4.3.4.1.orbit-db.tex}
diff --git a/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.3.ipfs-technologies/4.3.3.1.orbit-db.tex b/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.4.ipfs-technologies/4.3.4.1.orbit-db.tex
similarity index 98%
rename from chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.3.ipfs-technologies/4.3.3.1.orbit-db.tex
rename to chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.4.ipfs-technologies/4.3.4.1.orbit-db.tex
index 3ab4dbc..def5902 100644
--- a/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.3.ipfs-technologies/4.3.3.1.orbit-db.tex
+++ b/chapters/4.application-implementation/4.3.implementation-technology-stack/4.3.4.ipfs-technologies/4.3.4.1.orbit-db.tex
@@ -1,4 +1,4 @@
-\subsubsection{OrbitDB} \label{subsection:4-3-3-1-orbit-db}
+\subsubsection{OrbitDB} \label{subsection:4-3-4-1-orbit-db}
 
 \logo{chapter-4/4.3.orbitdb-logo}{OrbitDB logo}