diff --git a/Ingegneria del Software/16/quest.txt b/Ingegneria del Software/16/quest.txt
index 7bb9538..ce9037d 100644
--- a/Ingegneria del Software/16/quest.txt	
+++ b/Ingegneria del Software/16/quest.txt	
@@ -1,3 +1,3 @@
-img=https://imgur.com/sB0yXg9
+img=https://i.imgur.com/sB0yXg9.png
 Lo State Diagram in figura descrive (in modo semplificato) una macchina distributrice di bevande. Quale dei
 seguenti Sequence Diagram è consistente con lo State Diagram in figura ?
diff --git a/Ingegneria del Software/20/quest.txt b/Ingegneria del Software/20/quest.txt
index 48f4fe5..1fb3954 100644
--- a/Ingegneria del Software/20/quest.txt	
+++ b/Ingegneria del Software/20/quest.txt	
@@ -1,3 +1,3 @@
-img=https://imgur.com/Wk63xgA
+img=https://i.imgur.com/Wk63xgA.png
 Lo state diagram in figura descrive (in modo semplificato) una macchina distributrice di bevande. Quale dei seguenti
-modelli Modelica è plausibile per lo state diagram in figura?
\ No newline at end of file
+modelli Modelica è plausibile per lo state diagram in figura?
diff --git a/Ingegneria del Software/21/quest.txt b/Ingegneria del Software/21/quest.txt
index 7c61ecc..7799f39 100644
--- a/Ingegneria del Software/21/quest.txt	
+++ b/Ingegneria del Software/21/quest.txt	
@@ -1,2 +1,2 @@
-img=https://imgur.com/jHN6wRm
-Quale delle seguenti frasi è corretta riguardo all'activity diagram in figura ?
\ No newline at end of file
+img=https://i.imgur.com/jHN6wRm.png
+Quale delle seguenti frasi è corretta riguardo all'activity diagram in figura ?
diff --git a/Ingegneria del Software/32/correct.txt b/Ingegneria del Software/32/correct.txt
index e11056c..90c1575 100644
--- a/Ingegneria del Software/32/correct.txt	
+++ b/Ingegneria del Software/32/correct.txt	
@@ -1 +1 @@
-img=https://imgur.com/qKyYHVj
\ No newline at end of file
+img=https://i.imgur.com/qKyYHVj.png
diff --git a/Ingegneria del Software/32/wrong 2.txt b/Ingegneria del Software/32/wrong 2.txt
index 14aba6f..54e368c 100644
--- a/Ingegneria del Software/32/wrong 2.txt	
+++ b/Ingegneria del Software/32/wrong 2.txt	
@@ -1 +1 @@
-img=https://imgur.com/5I3NjLb
\ No newline at end of file
+img=https://i.imgur.com/5I3NjLb.png
diff --git a/Ingegneria del Software/32/wrong.txt b/Ingegneria del Software/32/wrong.txt
index a571746..c3a4d99 100644
--- a/Ingegneria del Software/32/wrong.txt	
+++ b/Ingegneria del Software/32/wrong.txt	
@@ -1 +1 @@
-img=https://imgur.com/NDNLPgt
\ No newline at end of file
+img=https://i.imgur.com/NDNLPgt.png
diff --git a/Ingegneria del Software/45/quest.txt b/Ingegneria del Software/45/quest.txt
index 80e366c..e43794a 100644
--- a/Ingegneria del Software/45/quest.txt	
+++ b/Ingegneria del Software/45/quest.txt	
@@ -1,2 +1,2 @@
-img = https://imgur.com/7DG7vhi
-Quale pattern architetturale meglio descrive l'architettura in figura ?
\ No newline at end of file
+img=https://i.imgur.com/7DG7vhi.png
+Quale pattern architetturale meglio descrive l'architettura in figura ?
diff --git a/Ingegneria del Software/46/correct.txt b/Ingegneria del Software/46/correct.txt
index 4ea53ed..4a45407 100644
--- a/Ingegneria del Software/46/correct.txt	
+++ b/Ingegneria del Software/46/correct.txt	
@@ -1 +1 @@
-img=https://imgur.com/cMy78HJ
\ No newline at end of file
+img=https://i.imgur.com/cMy78HJ.png
diff --git a/Ingegneria del Software/46/wrong 2.txt b/Ingegneria del Software/46/wrong 2.txt
index ecbda20..5b7d09a 100644
--- a/Ingegneria del Software/46/wrong 2.txt	
+++ b/Ingegneria del Software/46/wrong 2.txt	
@@ -1 +1 @@
-img=https://imgur.com/7lOYboM
\ No newline at end of file
+img=https://i.imgur.com/7lOYboM.png
diff --git a/Ingegneria del Software/46/wrong.txt b/Ingegneria del Software/46/wrong.txt
index c634767..50bd343 100644
--- a/Ingegneria del Software/46/wrong.txt	
+++ b/Ingegneria del Software/46/wrong.txt	
@@ -1 +1 @@
-img=https://imgur.com/4gXreOh
\ No newline at end of file
+img=https://i.imgur.com/4gXreOh.png
diff --git a/Ingegneria del Software/47/quest.txt b/Ingegneria del Software/47/quest.txt
index c691bc8..193a65f 100644
--- a/Ingegneria del Software/47/quest.txt	
+++ b/Ingegneria del Software/47/quest.txt	
@@ -1,3 +1,3 @@
-img=https://imgur.com/qNh120A
+img=https://i.imgur.com/qNh120A.png
 Lo State Diagram in figura descrive (in modo semplificato) una macchina distributrice di bevande. Quale delle seguenti
-frasi è corretta riguardo allo State Diagram in figura ?
\ No newline at end of file
+frasi è corretta riguardo allo State Diagram in figura ?
diff --git a/Ingegneria del Software/50/quest.txt b/Ingegneria del Software/50/quest.txt
index 6437d53..7816962 100644
--- a/Ingegneria del Software/50/quest.txt	
+++ b/Ingegneria del Software/50/quest.txt	
@@ -1,2 +1,2 @@
-img=https://imgur.com/0OTH4Yw
-Quale delle seguenti frasi è corretta riguardo al Sequence Diagram in figura?
\ No newline at end of file
+img=https://i.imgur.com/0OTH4Yw.png
+Quale delle seguenti frasi è corretta riguardo al Sequence Diagram in figura?
diff --git a/check-ingsw-photos.sh b/check-ingsw-photos.sh
new file mode 100755
index 0000000..94b92a1
--- /dev/null
+++ b/check-ingsw-photos.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+SEARCHDIR="./Ingegneria del Software/"
+
+echo "Invalid URLs:"
+
+for img in `grep "img" "$SEARCHDIR" -R | sed -E 's/^(.*?)\.txt\:img\=//'`; do
+    img=$(echo "$img"|tr -d '\n'|tr -d '\r')
+    curl -I "$img" 2>/dev/null | \
+        grep -i "Content-Type: image/" >/dev/null
+    if [ "$?" -ne 0 ]; then
+        (
+            cd "$SEARCHDIR"
+            grep "$img" . -R
+        )
+    fi
+done